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Grape Berry Moth Control in Concord Grape, 2021

Grape Berry Moth Control in Concord Grape, 2021 Grape | Vitis vinifera Grape berry moth | Paralobesia viteana, eastern grape leafhopper | Erythroneura comes, western grape leafhopper | Erythroneura elegantula methoxyfenozide, chlorantraniliprole, cyclaniliprole, spinetoram, phosmet, fenpropathrin, zeta-cypermethrin, cyfluthrin This trial was set up to evaluate different programs against GBM in grapes. Insecticides were applied to 16-yr-old ‘Concord’ grape vines (Vineyard 1) at the Trevor Nichols Research Center near Fennville, MI, with a tractor-mounted FMC 1029 airblast sprayer calibrated to deliver 50 gpa at 2.5 mph. Plots consisted of one 42-ft-long row of vines spaced 6 × 10 ft arranged in an RCB design with four replications. Maintenance applications including Rally 40 WSB, PyGanic 5.0 EC, Gramoxone, Imidan 70SB, Princep, Solicam, and Glyphosate were applied to the entire vineyard. Evaluations for GBM occurred on 29 July, 16 Aug., and 16 Sep. by inspecting 50 grape clusters per plot for GBM larvae infestation (Table 1). GLH (presence or absence) was evaluated on 29 July and 16 August by inspecting 50 leaves per plot (Table 2). GLH leaf damage was evaluated on 29 July, 16 August, and 16 September by inspecting 50 leaves/plot (Table 3). Fruit were evaluated at harvest on 5 October for damage and presence of GBM (Table 4). Table 1. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1720 GDD), G = 31 Aug. (E+14 d), H = 3 Sept. (F + 14 d), I = 17 Sept. (H + 14 d). Open in new tab Table 1. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1720 GDD), G = 31 Aug. (E+14 d), H = 3 Sept. (F + 14 d), I = 17 Sept. (H + 14 d). Open in new tab Table 2. Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA =20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 2. Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA =20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 3. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 3. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 4. Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 4. Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab GBM data are presented as mean percent incidence of GBM damage (Table 1). GLH data are presented as mean percent incidence of GLH (Table 2) and mean percent incidence of leaf damage by GLH (Table 3). Harvest GBM data are presented as mean number of grapes with GBM damage per cluster, mean percent of grape cluster damaged by GBM, and mean percent incidence of GBM damaged clusters (Table 4). ANOVA was performed on log-transformed data. Transformed treatment means were analyzed using ANOVA and means separation by Tukey’s HSD at P = 0.05. The Tombstone treatment and Intrepid/Altacor/Verdepryn/Delegate treatment program both significantly reduced the incidence of GBM infestation in the 16 September evaluation (Table 1). The Tombstone treatment and Baythroid/Imidan/Danitol/Mustang Maxx treatment program both significantly reduced the incidence of GLH in the 16 August evaluation (Table 2). The Tombstone treatment and Baythroid/Imidan/Danitol/Mustang Maxx treatment program both significantly reduced the incidence of GBM leaf injury in one or more of the evaluations (Table 3). There were no significant differences between the treatments and the untreated check in the 5 October harvest evaluation (Table 4).1 Footnotes 1 This research was supported by industry gifts of pesticides and research funding. © The Author(s) 2022. Published by Oxford University Press on behalf of Entomological Society of America. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Grape Berry Moth Control in Concord Grape, 2021

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Publisher
Oxford University Press
Copyright
Copyright © 2023 Entomological Society of America
eISSN
2155-9856
DOI
10.1093/amt/tsac038
Publisher site
See Article on Publisher Site

Abstract

Grape | Vitis vinifera Grape berry moth | Paralobesia viteana, eastern grape leafhopper | Erythroneura comes, western grape leafhopper | Erythroneura elegantula methoxyfenozide, chlorantraniliprole, cyclaniliprole, spinetoram, phosmet, fenpropathrin, zeta-cypermethrin, cyfluthrin This trial was set up to evaluate different programs against GBM in grapes. Insecticides were applied to 16-yr-old ‘Concord’ grape vines (Vineyard 1) at the Trevor Nichols Research Center near Fennville, MI, with a tractor-mounted FMC 1029 airblast sprayer calibrated to deliver 50 gpa at 2.5 mph. Plots consisted of one 42-ft-long row of vines spaced 6 × 10 ft arranged in an RCB design with four replications. Maintenance applications including Rally 40 WSB, PyGanic 5.0 EC, Gramoxone, Imidan 70SB, Princep, Solicam, and Glyphosate were applied to the entire vineyard. Evaluations for GBM occurred on 29 July, 16 Aug., and 16 Sep. by inspecting 50 grape clusters per plot for GBM larvae infestation (Table 1). GLH (presence or absence) was evaluated on 29 July and 16 August by inspecting 50 leaves per plot (Table 2). GLH leaf damage was evaluated on 29 July, 16 August, and 16 September by inspecting 50 leaves/plot (Table 3). Fruit were evaluated at harvest on 5 October for damage and presence of GBM (Table 4). Table 1. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1720 GDD), G = 31 Aug. (E+14 d), H = 3 Sept. (F + 14 d), I = 17 Sept. (H + 14 d). Open in new tab Table 1. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence GBM (50 grape clusters per plot) . . . . . . 29 July . 16 Aug. . 16 Sep. . Untreated check 0a 0a 52a Intrepid 2F + 12 fl oz A 0a 0a 30b  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0a 0a 37ab  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 0a 0a 30b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1720 GDD), G = 31 Aug. (E+14 d), H = 3 Sept. (F + 14 d), I = 17 Sept. (H + 14 d). Open in new tab Table 2. Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA =20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 2. Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Treatment/form. . Rate product/acre . Appl. codea . Mean % Incidence GLH (50 grape leaves per plot) . . . . . 29 July . 16 Aug. . Untreated check 51a 11a Intrepid 2F + 12 fl oz A 34a 15a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 0b 0b  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1b 0b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA =20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 3. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 3. Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Treatment/form. . Rate product/acre . Appl. codea . Mean % incidence leaf damage by GLH (50 leaves per plot) . . . . . . 29 July . 16 Aug. . 16 Sept. . Untreated check 90.5a 82ab 81a Intrepid 2F + 12 fl oz A 90a 92a 78.5a  Altacor 35WG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 72b 76.5ab 72.5a  Imidan 70P + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 71b 65b 61.5b Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 4. Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab Table 4. Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Treatment/form. . Rate product/acre . Appl. codea . Mean no. GBM damaged grapes per cluster . Mean % grape cluster damaged by GBM . Mean % incidence GBM damaged clusters . . . . Harvest 5 Oct. . Harvest 5 Oct. . Harvest 5 Oct. . Untreated check 3.8a 21a 71a Intrepid 2F + 12 fl oz A 3.8a 21a 48a  Altacor WDG + 4 oz C  Verdepryn 100SL + 11 fl oz E  Delegate 25WG 5 oz GI Baythroid XL + 3.2 fl oz B 1.0a 5a 31.5a  Imidan 70WP + 2 lb D  Danitol 2.4EC + 10.6 fl oz F  Mustang Maxx 0.8EC 4 fl oz HI Tombstone Helios 2.0EC 3.2 fl oz BDFHI 1.4a 7a 36a Means followed by same letter do not significantly differ (P ≤ 0.05, Tukey’s HSD). ANOVA performed on log-transformed data; nontransformed means are presented in the table. aA = 20 July (810 GDD), B = 20 July (910 GDD), C = 30 July (A + 10 d), D = 30 July (B + 10 d), E = 17 Aug. (1,620 GDD), F = 20 Aug. (1,720 GDD), G = 31 Aug. (E + 14 d), H = 3 Sep. (F + 14 d), I = 17 Sep. (H + 14 d). Open in new tab GBM data are presented as mean percent incidence of GBM damage (Table 1). GLH data are presented as mean percent incidence of GLH (Table 2) and mean percent incidence of leaf damage by GLH (Table 3). Harvest GBM data are presented as mean number of grapes with GBM damage per cluster, mean percent of grape cluster damaged by GBM, and mean percent incidence of GBM damaged clusters (Table 4). ANOVA was performed on log-transformed data. Transformed treatment means were analyzed using ANOVA and means separation by Tukey’s HSD at P = 0.05. The Tombstone treatment and Intrepid/Altacor/Verdepryn/Delegate treatment program both significantly reduced the incidence of GBM infestation in the 16 September evaluation (Table 1). The Tombstone treatment and Baythroid/Imidan/Danitol/Mustang Maxx treatment program both significantly reduced the incidence of GLH in the 16 August evaluation (Table 2). The Tombstone treatment and Baythroid/Imidan/Danitol/Mustang Maxx treatment program both significantly reduced the incidence of GBM leaf injury in one or more of the evaluations (Table 3). There were no significant differences between the treatments and the untreated check in the 5 October harvest evaluation (Table 4).1 Footnotes 1 This research was supported by industry gifts of pesticides and research funding. © The Author(s) 2022. Published by Oxford University Press on behalf of Entomological Society of America. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2022

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