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Citrus Red Mite Pesticide Efficacy Trials, 1995, 1996

Citrus Red Mite Pesticide Efficacy Trials, 1995, 1996 Downloaded from https://academic.oup.com/amt/article-abstract/22/1/69/4639852 by DeepDyve user on 21 July 2020 D: CITRUS, NUTS , AN D AVOCADOS Arthropod Management Tests, Vol. 22 69 ORANGE: Citrus sinensis (L.) Osbeck 'Washington navel' E. E. Grafton-Cardwell and C. A. Reagan (13D) Citrus red mite; Panonychus citri (McGregor) Department of Entomology University of California Predatory mite; Euseius tularensis Congdon Riverside, C A 92521 (209) 891-2500 CITRUS RED MITE PESTICIDE EFFICAC Y TRIALS, 1995, 1996: Acaricides for control of citrus red mite were evaluated in the spring of 1995 and 1996 on =2 0 year old 'Washington navel' orange trees at the Lindcove Research and Extension Center, Exeter, CA. The acaricides were compared for efficacy against citrus red mite as well as their impact on populations of a predatory mite, which feeds on citrus red mite in San Joaquin Valley or­ chards. The acaricides were applied on 19 May in 1995; and on 8 Apr in 1996 using a Bean hand-sprayer at 300 psi and approximately 300 gpa (3^1 gal/tree). Single tree treatments were assigned based on pretreatment sampling of citrus red mite conducted on 9 May 1995 and 7 Apr 1996. Samples con­ sisted of five leaves from the periphery of four quadrants of each tree (20 leaves per tree). The number of all active stages of citrus red mite and predatory mites per leaf were recorded weekly. In 1995, citrus red mite densities were relatively low, peaking 6 DAT with < 1 citrus red mite per leaf in the water treated trees. All of the acari­ cides reduced citrus red mite densities for approximately 20 DAT. However, the most significant reduction was found in treatments where Agri-Mek and CM-006 were applied with 0.33% Uni-Par oil or oil was applied alone. In 1995, the predatory mite, E. tularensis, increased to approximately 0.70 mites per leaf 6 DAT. All treatments reduced the predatory mite densities on one or more dates during the period 6 to 20 DAT. Adding oil to CM-006 and Agri- Mek improved efficacy against citrus red mite somewhat, but also increased toxicity to the beneficial, predatory mite. In 1996, the citrus red mite and predatory mite densities were higher than in 1995. Citrus red mite densities peaked 6 DA T with an average of nearly 12 per leaf in the water-treated trees. In this situation of relatively high citrus red mite densities, Agri-Mek significantly suppressed the citrus red mite pop­ ulation for 13 days, CM-00 6 for 27 days, and the two rates of Sanmite for 34 days. The high rate of Sanmite (0.67 lb Al/acre) resulted in the greatest pop­ ulation suppression. In 1996, the predatory mite population peaked 27 DA T at approximately 1 predatory mite per leaf. CM-006 significantly suppressed the predatory mite population for 27 days, Agri-Mek for 34 days, Sanmite (0.33 lb/acre) for 40 days and Sanmite (0.67 lb/acre) for 48 days. Thus, San­ mite showed the greatest efficacy against citrus red mite and also showed the most prolonged and most significant suppression of the predatory mites. Mean no. citrus red mites/leaf DAT Rate Treatment/formulation form/acre Pretreatment + 6 + 13 + 20 + 27 + 34 0.66a 0.99a 0.54a 0.54a 0.3 lab 0.16b Check (water) 0.63a 0.3 la b 0.17b Agri-Mek 0.15 EC 10.0 oz 0.34b 0.2 la b 0.14b Agri-Mek 0.15 EC + Uni-Par Oil 10.0 oz + 0.33% 0.61a 0.20b 0.23ab 0.06b 0.08b 0.01b CM-006 1% EC 0.57a 0.28ab 0.25ab 101.5 ml 0.34b 0.29ab 0.48a CM-006 1% E C + Uni-Par Oil 101.5 ml + 0.33% 0.55a 0.03b 0.17b 0.09b 0.33b 0.00b Uni-Par Oil 0.33 % 0.53a 0.04bc 0.33b 0.23ab 0.11b 0.43a Means within a column followed by the same letter are not significantly different (LSD, P - 0.05) after log (A' +1 ) transformation. Untransformed means are listed. Mean no predatory mites/leaf DA T Rate Treatment/formulation form/acre Pretreatment + 6 + 13 + 20 + 27 + 34 Check (water) 0.22ab 0.70a 0.20a 0.73a 0.75a 1.13a Agri-Mek 0.15 EC 10.0 oz 0.23ab 0.28b 0.21a 0.41b 0.48ab 0.64b Agri-Mek 0.15 EC + Uni-Par Oil 10.0 oz + 0.33% 0.26ab 0.46ab 0.18a 0.24bc 0.29b 0.39b CM-006 1%EC 101.5 ml 0.23ab 0.4 la b 0.21a 0.43b 0.53ab 0.99a CM-006 1% EC + Uni-Par Oil 101.5 ml + 0.33% 0.16ab 0.36b 0.13a 0.24bc 0.30b 0.51c Uni-Par Oil 0.33 % 0.40a 0.29b 0.29a 0.23c 0.48ab 0.57bc Means within a column followed by the same letter are not significantly different (LSD, P 0.05) after log, (X + 1) transformation. Untransformed means are listed. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/69/4639852 by DeepDyve user on 21 July 2020 70 Arthropod Management Tests, Vol. 22 D: CITRUS, NUTS , AND AVOCADOS Mean no. citrus red mites/leaf DA T Rate Treatment/formulation form/acre Pretreatment + 6 + 13 + 20 + 27 + 34 +4 0 +4 8 Check (water) 7.76a 11.89a 10.98a 3.54a 2.83a 0.89b 0.06b 0.18ab 7.75a 3.46b 3.62b 2.43a Agri-Mek0.15E C 10.0 fl oz 3.12ab 1.31a 0.34a 0.29aa 7.77a 2.61b 1.44b CM-006 1%EC 101.5 ml 2.77b 2.32b 0.79b 0.16b 0.22ab 0.33 lb 7.71a 1.51c 1.12c 0.83c 0.38c 0.14b Sanmite 75 WP 1.32c 0.28a 0.67 lb 7.68a 0.63d 0.45d 0.21d 0.17c 0.06b Sanmite 75 WP 0.30d 0.11b Means within a column followed by the same letter are not significantly different (LSD, P • 0.05) after log (X + 1) transformation. Untransformed means are listed. predatory mites/leaf Mean no. DAT Rate + 27 Treatment/formulation form/acre Pretreatment + 6 + 13 +2 0 + 34 +4 0 +4 8 0.01a 0.21a 0.61a 1.04a 0.89a Check (water) 0.02ab 0.90a 0.47a 0.05b 0.30b 0.69b Agri-Mek0.15E C 10.0 floz 0.01 0.03a 0.44bc 0.72ab 0.49a CM-006 1%EC 101.5 ml 0.00a 0.03a 0.04b 0.31b 0.51b 0.70ab 0.63ab 0.38ab Sanmite 75 WP 0.33 lb 0.04b 0.07c 0.28c 0.01a 0.00a 0.28c 0.60b 0.42a Sanmite 75 WP 0.67 lb 0.01b 0.01c 0.03d 0.00a 0.00a 0.07d 0.20c 0.16b Means within a column followed by the same letter are not significantly different (LSD, P • 0.05) after log, (X + 1) transformation. Untransformed means are listed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Citrus Red Mite Pesticide Efficacy Trials, 1995, 1996

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Oxford University Press
Copyright
© 1997 Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/22.1.69
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/22/1/69/4639852 by DeepDyve user on 21 July 2020 D: CITRUS, NUTS , AN D AVOCADOS Arthropod Management Tests, Vol. 22 69 ORANGE: Citrus sinensis (L.) Osbeck 'Washington navel' E. E. Grafton-Cardwell and C. A. Reagan (13D) Citrus red mite; Panonychus citri (McGregor) Department of Entomology University of California Predatory mite; Euseius tularensis Congdon Riverside, C A 92521 (209) 891-2500 CITRUS RED MITE PESTICIDE EFFICAC Y TRIALS, 1995, 1996: Acaricides for control of citrus red mite were evaluated in the spring of 1995 and 1996 on =2 0 year old 'Washington navel' orange trees at the Lindcove Research and Extension Center, Exeter, CA. The acaricides were compared for efficacy against citrus red mite as well as their impact on populations of a predatory mite, which feeds on citrus red mite in San Joaquin Valley or­ chards. The acaricides were applied on 19 May in 1995; and on 8 Apr in 1996 using a Bean hand-sprayer at 300 psi and approximately 300 gpa (3^1 gal/tree). Single tree treatments were assigned based on pretreatment sampling of citrus red mite conducted on 9 May 1995 and 7 Apr 1996. Samples con­ sisted of five leaves from the periphery of four quadrants of each tree (20 leaves per tree). The number of all active stages of citrus red mite and predatory mites per leaf were recorded weekly. In 1995, citrus red mite densities were relatively low, peaking 6 DAT with < 1 citrus red mite per leaf in the water treated trees. All of the acari­ cides reduced citrus red mite densities for approximately 20 DAT. However, the most significant reduction was found in treatments where Agri-Mek and CM-006 were applied with 0.33% Uni-Par oil or oil was applied alone. In 1995, the predatory mite, E. tularensis, increased to approximately 0.70 mites per leaf 6 DAT. All treatments reduced the predatory mite densities on one or more dates during the period 6 to 20 DAT. Adding oil to CM-006 and Agri- Mek improved efficacy against citrus red mite somewhat, but also increased toxicity to the beneficial, predatory mite. In 1996, the citrus red mite and predatory mite densities were higher than in 1995. Citrus red mite densities peaked 6 DA T with an average of nearly 12 per leaf in the water-treated trees. In this situation of relatively high citrus red mite densities, Agri-Mek significantly suppressed the citrus red mite pop­ ulation for 13 days, CM-00 6 for 27 days, and the two rates of Sanmite for 34 days. The high rate of Sanmite (0.67 lb Al/acre) resulted in the greatest pop­ ulation suppression. In 1996, the predatory mite population peaked 27 DA T at approximately 1 predatory mite per leaf. CM-006 significantly suppressed the predatory mite population for 27 days, Agri-Mek for 34 days, Sanmite (0.33 lb/acre) for 40 days and Sanmite (0.67 lb/acre) for 48 days. Thus, San­ mite showed the greatest efficacy against citrus red mite and also showed the most prolonged and most significant suppression of the predatory mites. Mean no. citrus red mites/leaf DAT Rate Treatment/formulation form/acre Pretreatment + 6 + 13 + 20 + 27 + 34 0.66a 0.99a 0.54a 0.54a 0.3 lab 0.16b Check (water) 0.63a 0.3 la b 0.17b Agri-Mek 0.15 EC 10.0 oz 0.34b 0.2 la b 0.14b Agri-Mek 0.15 EC + Uni-Par Oil 10.0 oz + 0.33% 0.61a 0.20b 0.23ab 0.06b 0.08b 0.01b CM-006 1% EC 0.57a 0.28ab 0.25ab 101.5 ml 0.34b 0.29ab 0.48a CM-006 1% E C + Uni-Par Oil 101.5 ml + 0.33% 0.55a 0.03b 0.17b 0.09b 0.33b 0.00b Uni-Par Oil 0.33 % 0.53a 0.04bc 0.33b 0.23ab 0.11b 0.43a Means within a column followed by the same letter are not significantly different (LSD, P - 0.05) after log (A' +1 ) transformation. Untransformed means are listed. Mean no predatory mites/leaf DA T Rate Treatment/formulation form/acre Pretreatment + 6 + 13 + 20 + 27 + 34 Check (water) 0.22ab 0.70a 0.20a 0.73a 0.75a 1.13a Agri-Mek 0.15 EC 10.0 oz 0.23ab 0.28b 0.21a 0.41b 0.48ab 0.64b Agri-Mek 0.15 EC + Uni-Par Oil 10.0 oz + 0.33% 0.26ab 0.46ab 0.18a 0.24bc 0.29b 0.39b CM-006 1%EC 101.5 ml 0.23ab 0.4 la b 0.21a 0.43b 0.53ab 0.99a CM-006 1% EC + Uni-Par Oil 101.5 ml + 0.33% 0.16ab 0.36b 0.13a 0.24bc 0.30b 0.51c Uni-Par Oil 0.33 % 0.40a 0.29b 0.29a 0.23c 0.48ab 0.57bc Means within a column followed by the same letter are not significantly different (LSD, P 0.05) after log, (X + 1) transformation. Untransformed means are listed. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/69/4639852 by DeepDyve user on 21 July 2020 70 Arthropod Management Tests, Vol. 22 D: CITRUS, NUTS , AND AVOCADOS Mean no. citrus red mites/leaf DA T Rate Treatment/formulation form/acre Pretreatment + 6 + 13 + 20 + 27 + 34 +4 0 +4 8 Check (water) 7.76a 11.89a 10.98a 3.54a 2.83a 0.89b 0.06b 0.18ab 7.75a 3.46b 3.62b 2.43a Agri-Mek0.15E C 10.0 fl oz 3.12ab 1.31a 0.34a 0.29aa 7.77a 2.61b 1.44b CM-006 1%EC 101.5 ml 2.77b 2.32b 0.79b 0.16b 0.22ab 0.33 lb 7.71a 1.51c 1.12c 0.83c 0.38c 0.14b Sanmite 75 WP 1.32c 0.28a 0.67 lb 7.68a 0.63d 0.45d 0.21d 0.17c 0.06b Sanmite 75 WP 0.30d 0.11b Means within a column followed by the same letter are not significantly different (LSD, P • 0.05) after log (X + 1) transformation. Untransformed means are listed. predatory mites/leaf Mean no. DAT Rate + 27 Treatment/formulation form/acre Pretreatment + 6 + 13 +2 0 + 34 +4 0 +4 8 0.01a 0.21a 0.61a 1.04a 0.89a Check (water) 0.02ab 0.90a 0.47a 0.05b 0.30b 0.69b Agri-Mek0.15E C 10.0 floz 0.01 0.03a 0.44bc 0.72ab 0.49a CM-006 1%EC 101.5 ml 0.00a 0.03a 0.04b 0.31b 0.51b 0.70ab 0.63ab 0.38ab Sanmite 75 WP 0.33 lb 0.04b 0.07c 0.28c 0.01a 0.00a 0.28c 0.60b 0.42a Sanmite 75 WP 0.67 lb 0.01b 0.01c 0.03d 0.00a 0.00a 0.07d 0.20c 0.16b Means within a column followed by the same letter are not significantly different (LSD, P • 0.05) after log, (X + 1) transformation. Untransformed means are listed.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1997

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