Downloaded from https://academic.oup.com/amt/article-abstract/22/1/55/4639792 by DeepDyve user on 21 July 2020 C: SMALL FRUITS Arthropod Management Tests, Vol. 22 55 GRAPE: Vitus labrusca L. 'Concord' John C. Wise (IOC) Grape Berry Moth (GBM), Endopiza viteana Clemens Department of Entomology Grape Leafhopper (GLH), Erythroneura comes Say Michigan State University East Lansing, MI 48824-1115 (517)432-349 4 GRAPE , SEASO N LON G BROA D SPECTRU M INSECT CONTROL , 1996: Insecticides were applied to mature (16 year old) cv. 'Concord' grape vines at the Trevor Nichols Research Complex near Fennville, MI at a rate of 50 GPA using a FM C 1029 airblast sprayer. Treatments were arranged in a completely randomized design of single 50 ft long rows of vines replicated four times. Applications of materials were made on 28 Jun (Bloom, 725 Degree Days base 50 for GLH), 10 Ju l (3C), 22 Jul (4C), 7 Aug (5C), 21 Aug (6C), 3 Sep (7C), and 16 Sep (8C). Grape leafhopper evaluations were made on 19 Jul and 15 Aug by randomly selecting 50 leaves per replicate, or 200 leaves per treatment, and examining them for presence of GLH nymphs. Har vest fruit evaluations were made on 30 Sep by randomly selecting 25 grape clusters per replicate, or 200 per treatment, and counting the number of clus ters with damage from GBM larvae. Both Penncap-M and Sevin XLR provided excellent season long control of GLH. Sankyo's insect growth regulator CM-001 SC formulation also controlled GLH-reducing its population significantly below that of the untreated check. Both Penncap-M and Sevin XLR did an excellent jo b of prevent ing GBM damage to fruit. The 13.53 oz per acre rates of CM-001 (SC and EC formulations) provided significant control of GBM, the SC formulation showing slightly superior performance. GLH nymphs per 50 leaves GBM damage/25 clusters Treatment Amt. Form./Acre Growth Stage 15 Jun 30 Sep 19 Jul Untreated Check 11.8a 8.0ab 14.0a 8p t Bloom, 3C-8C 0.0b 0.8d O.Od Penncap-M Sevin XLR.66 EC 4 oz Bloom, 3C-8C 0.0b 0.5d 0.8d 6.76 oz Bloom, 5C, 8C 3.5cd 8.0b CM-001SC 2.8b 2.8cd 2.8cd CM-001SC 13.53 oz Bloom, 5C, 8C 2:5b 5.0bc 12.3a CM-001 EC 6.76 oz Bloom, 5C, 8C 8.3a CM-001 E C 13.53 oz Bloom, 5C, 8C 9.8a 9.3a 5.3bc Means in a column followed by the same letter are not significantly different (P = 0.05, Duncan's MRT) RASPBERRY (RED): Rubus idaeus 'Willamette' L. K. Tanigoshi, J.D. Chamberlain (11C) Black vine weevil (BVW); Otiorhynchus sulcatus (F.) and T.A. Murray Department of Entomology Vancouver Research & Extension Unit Washington State University Vancouver, WA 98665-9752 (360)576-603 0 ROOT WEEVIL CONTROL ON RED RASPBERRY, 1996A: Four insecticides were evaluated for control of preovipositional adult BVW in two fields of mature 'Willamette' red raspberries in Lynden, WA. Treatments were replicated 4 times on 9 X 30 ft plots arranged in a RC B design. Sprays were applied on 11 Jun along the lower 3 feet of canes with a 2-ft hand-held boom sprayer (100 psi) equipped with 3 hollow cone D4-45 TeeJet nozzles which delivered 100 gpa at 2 mph. Field counts were made on 18 and 25 Jun beginning at 10PM by placing 25-ft long X 4-ft wide strips of white linen sheet under each side of the row and simultaneously shaking the top training wire vigorously 10 times at 2 locations, one-quarter of the way in from each end of both sheets. All of the treatments significantly reduced BV W populations at Farm M. Guthion treatment was not significantly different from the untreated check 3 DAT for large field populations at Farm D. By 14 DAT , Alert 2SC and fipronil 80WG performed as well as the standard Brigade 10WP treatment. Though significant, Guthion 50WP was marginal 14 DAT. FARM M Rate Mean no. weevils/plot lb (AI)/ Treatment acre 7 DAT 14 DAT Alert 2SC 0.32 5.3b 3.5b Fipronil 80WG 0.10 6.3b 4.3b Brigade 10WP 0.10 0.8b 0.8b Guthion 50WP 0.50 11.8b 10.5b Untreated Check n/a 59.8a 60.0a Means within a column followed by the same letter are not significantly different (P < 0.05; LSD).
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 1997