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Downloaded from https://academic.oup.com/amt/article-abstract/22/1/138/4640163 by DeepDyve user on 21 July 2020 138 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS MUSTARD : Brassica campestris L. 'Savanah' J. V. Edelson and M. Peters (63Ei Turnip aphid (TA): Lipaphis erysimi (Kaltenbach) Oklahoma State Univ./WWAREC Diamondback moth (DBM); Plutella xylostella (L.) Lane, OK 74555 Cabbage looper (CL); Trichoplusia ni (Hiibner) (405) 889-7343 CONTRO L OF APHIDS ON MUSTARD, 1996: 'Savanah' cultivar mustard was direct seeded to plots in Apr at the Wes Watkins AREC, Lane OK. Seeds were planted in one row on raised beds on 36 inch centers with ca. 3 inches between plants in rows. The experimental design was a RCB with 4 replicates and 16 treatments. Insecticide applications were made on 15 and 24 May using a tractor mounted sprayer with 2 hollow cone nozzles (TXVS 26) per bed applying 40 gpa solution at 40 psi. Insect populations were surveyed on 28 May by counting insects on 3 plants per plot to determine treat ment effects. Aphid infestations were heavy during the trial and lepidopterous larvae infestations were moderate. Endosulfan, M-Pede, Neemix, Aphistar anc Provado provided significant reduction in aphid numbers compared to the untreated plots. All insecticides except methomyl, dimethoate, Capsyn, Aphis tar and Provado provided significant reductions in lepidoptera larval numbers in plots. Mean no./3 plants Treatment Rate" Aphids* Lepidoptera Carbaryl 2.0 6,193 a 2 f Permethrin 0.1 5,783 ab 5cde f Methomyl 0.9 5,284 ab lOab c Methoxychlor 1.75 3,073 ab 1 f Sabadilla 0.06 lb/20 ft 2,524 ab 5cde f Pyrenone 993 b 9 abed 12 oz Untreated Check 352c 12 ab Malathion 1.25 271 cd 4de f Dimethoate 0.25 114c d 14 a Naled 2.0 69 cd 2e f 63 cd Capsyn 5,000 CHU's 7 bedef Endosulfan 0.75 55 d 3de f M-Pede 2.5 oz/gal carrier 43 d 3e f Neemix 2 gal 41 de 3e f Aphistar 4 oz 9e f 7 bedef Provado 1.6 3.75 oz 7 f 8bcd e Means in a column with common letters are not significantly different at P = 0.1 ((Data were analyzed using SAS and means separated with LSD.) Aphid numbers were transformed for analysis using a log 10 transformation.) "Rates: listed as lb (AI)/acre unless otherwise stated. Aphid s were primarily turnip aphids. 'Lepidoptera larvae included diamondback moth and cabbage looper. MUSTARD : Brassica juncea Cosson R. Story, A. O. Ameen, and (64E) Yellowmargined leaf beetle; M. J. Murray Microtheca ochroloma Stal Dept. Entomology, LAES LSU Agric. Ctr. Baton Rouge, LA 70803 (504) 388-1833 F. Can Dept. Horticulture, LAES LSU Agric. Ctr. Baton Rouge, LA 70803 D. Ring LA Coop. Ext. Service LSU Agric. Ctr. Baton Rouge, LA 70803 CONTRO L OF YELLOWMARGINE D LEAF BEETLE ON MUSTARD, 1995: Insecticide treatments at labeled rates were applied on mus tard on 11 and 18 May 1995 at the Burden Research Plantation, Baton Rouge, LA . A C0 powered backpack sprayer calibrated to deliver 40 gpa at 30 psi through a spray boom with three nozzles was used. Experimental plots consisted of single rows (30 feet long, 4 feet wide) arranged in a RCB design with 4 replications. Insect counts were made with beat sheets (3X2) on 10 May and 17 May (pre-treatment counts) and 12 May and 19 May (post-treatment counts). Three samples were taken from each plot and the number of insects present of each species was recorded. Populations of the yellowmargined leaf beetle were extremely high, while other pest species such as the diamondback moth and aphids were too few to obtain meaningful data. The best treatments were Asana, Merit at both the low and high rates, and Thiodan. Azatin (a neem seed extract), Lannate and Orthene performed poorly. Diazinon, Malathion, and Larvin were intermediate in performance. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/138/4640163 by DeepDyve user on 21 July 2020 Arthropod Management Tests, Vol. 22 139 6: VEGETABLE CROPS Mean no /Beat Sheet Mean no ./Beat Sheet First application Second application Treatment/ Rate Formulation Adults Larvae Adults Larvae amt (AI)/acre 62.50 ab Untreated Check 12.75 a 6.50 be 90.25 a Larvin 3.2F 0.41b. 8.25 ab 7.50 be 25.75 be 24.75 cde 4 oz. Azatin 3EC 8.75 ab 56.50 abc 4.50 c 90.00 a Thiodan 3EC 0.751b. 3.50 be 8.50 abc 30.25 be 3.00 e Provado 1.6FL 0.090 lb. 5.75 be 12.00 c ll.OOa b ll.OOde Provado 1.6FL 0.045 lb. 1.75 c 13.50 a 26.75 be 10.75 de Malathion 5EC 0.625 lb. 12.00 a 51.75 abc 7.50 be 56.50 abc 6.25 be 52.50 abc Orthene 755 0.5 lb. 7.75 be 72.00 ab Diazinon 4EC 0.251b. 5.50 be 44.50 abc 7.75 be 44.50 bed Lannate LV 2.4 0.045 lb. 6.25 be 92.00 a 7.00 be 88.75 a \san a 0.66EC 0.03 lb. 5.00 be 17.50 be 2.75 c 13.00 de Means in a column followed by the same letter are not significantly different (P = 0.05; mean separation based on DMRT). ONION: Allium cepa L. 'Mambo' Whitney Cranshaw (65E) Onion thrips; Thrips tabaci Lindeman Department of Bioagricultural Sciences and Pest Management Colorado State University Ft. Collins, C O 80523 Frank Schweissing Arkansas Valley Research Center 27901 Road 21 Rocky Ford, CO 81607 (970)491-6781 EVALUATION OF ADJUVANTS AND CO-APPLIED PESTICIDES ON ONION THRIPS CONTROL, 1996: The trial was conducted at i he Arkansas Valley Research Center in Rocky Ford, CO, on seeded onions (cv. Mambo) planted in double-row beds at 36-in centers. Plots consisted of a single row, 20-ft in length, and were arranged in a RC B design with three replications. Treatments were applied 8 Jul using a C0 compressed air sprayer delivering 24 gpa at 35 psi. Evaluations were made 16 Jul by counting all thrips on ten plants in the center of each plot. None of the adjuvants (Guardian, Kinetic, Cide-Kick) provided improved the control of onion thrips when used with the pyrethroid Warrior (lambda- i yalothrin). Co-application of Warrior with the fungicide Bravo 720 significantly reduced the control of onion thrips as compared with Warrior alone. Co- application with the bactericides Tenncop did not significantly reduce the thrips control below that obtained with Warrior alone. Treatment and rate/acre Mean no. thrips/plant Guardian 2.4 gal (10% v) 67.1 a Untreated Check 64.1 ab Bravo 720 3 pt + Warrior IE 0.015 lb (AI) 56.7 abc Guardian 2.4 gal/A + Warrior IE 0.015 lb (AI) 48.8 abed Champ Flowable 1.33 pt + Warrior 1E 0.015 lb (AI) 46.8 bed Kinetic 6 fl oz/A + Warrior IE 0.015 lb (AI) 39.0 cd Tenncop 3 pt + Warrior IE 0.015 lb (AI) 39.0 cd Warrior IE 0.015 lb (AI) 33.0 d Warrior 1E 0.02 lb (AI) 32.1 d Cide-Kick 1 pt + Warrior IE 0.015 lb (AI) 30.5 d Means within a column followed by the same letter are not significantly different (P = 0.05) by SNK test.
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 1997
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