Arthropod Management Tests, 2016, 1–2 doi: 10.1093/amt/tsv109 Section E: Vegetable Crops TOMATO: Lycopersicon esculentum Mill., ‘BHN 975’ Control of Sweetpotato Whitefly With Labeled, Experimental, and Biological Insecticides on Staked Tomatoes, Fall 2013, A* Philip A. Stansly and Barry C. Kostyk University of Florida/ IFAS, Southwest Florida Res. and Ed. Center, 2686 State Rd. 29 North, Immokalee, FL 34142- 9515, Phone: (239) 658-3427, Fax: (239) 658-3469 (pstansly@uﬂ.edu; bkostyk@uﬂ.edu) and Corresponding author, E-mail: pstansly@uﬂ.edu Subject Editor: Mark Abney Tomato j Lycopersicon esculentum sweetpotato whiteﬂy j Bemisia tabaci bifenthrin; Burkholderia spp.; Chromobacterium subtsugae; imidacloprid; malathion; pymetrozine; pyriproxyfen; spiromesifen; zeta-cypermethrin SWF is a destructive pest of tomato in Florida, primarily in its role equipped with yellow Albuz hollow cone nozzles, each delivering as a vector of tomato yellow leaf curl virus, which causes catastro- 10 gpa at 180 psi. Total spray volume increased from 40 to 80 gpa, phic yield losses, especially when infection occurs early in the crop as nozzles were added to accommodate plant growth (Table 1). cycle. The whitefly is also a pest in its own right, causing plant debil- Whitefly adults were evaluated weekly 2 Oct to 11 Dec on five itation and irregular ripening of the fruit. Two sets of three raised leaflets from one mid-canopy-level true leaf taken from five plants per beds 420 ft in length were prepared and fumigated with MBC50/50 plot. Eight 0.5-square inch leaf discs were cut from each of the three at 100 lbs/acre at the Southwest Florida Research and Education leaflets of one terminal seventh node trifoliate sampled 10 and 24 Center in Immokalee, FL, on 17 Aug, and 50% of the expected Oct, 7 Nov, and 12 Dec from five plants per plot and immature stages nutrient requirement was incorporated as 10-2-10 NPK dry fertil- counted under a stereoscopic microscope. Fruit of marketable size izer. Two drip tapes with 8-inch emitter spacing were laid on each were harvested from six plants in each plot on 26 Nov and culled for bed, as it was covered with black polyethylene film mulch, and seed- defects due to insect damage, uneven ripening, bacterial spot, and sur- lings of ‘BHN 975’ obtained from a commercial greenhouse were face deformities, such as shoulder cracking and zippering. Number, transplanted on 4 Sep spaced 18 inches apart. The center row in size, and weight of marketable fruit were recorded. Data were sub- each three-bed section was planted with variety PS01522935 and jected to ANOVA and means separated using LSD (P ¼ 0.05). left untreated to serve as a buffer and whitefly source. The remain- All treatments significantly reduced adults on 10, 24, and 31 Oct ing fertilizer requirements were met through fertigation with liquid compared to the untreated check. The standard program (Admire/ 7-2-7 NPK. Actigard (0.33–0.50 oz/acre), Koicide (1.5 lbs/acre), and Fulfill/Knack/Hero/Malathion/Oberon) and SE1 at 64 and 128 oz/ Manzate Pro Stick (1.5 lbs) were applied as needed for suppression acre provided the greatest reduction of adults on 10 Oct and the for- of fungal and bacterial disease. Xentari DF at 1.5 lbs was applied 3, mer on all remaining dates although differences from most other 11, 17, 24, and 31 Oct and 18 Nov along with Intrepid at 8.0 oz on treatments were not significant (Table 2). Significant reduction of 11 Oct for control of lepidopteran pests, primarily southern army- whitefly nymphs compared to the untreated check was seen on 10 worm Spodoptera eridania. Oct with the standard program, all three rates of MBI206, and the An RCB plot design was used with four replicates (rows) and 12 64 oz rate of SE1. Only the standard program resulted in signifi- treatments (Table 1). Plots consisted of 20 plants each, with four cantly lower numbers of nymphs compared to the untreated check plants left between plots as buffers. Soil drenches of Admire Pro and on 24 Oct and 7 Nov, with no significant treatment effect on Sivanto were made 11 Sep by delivering a 100 ml suspension per nymphs seen on 12 Dec. No significant differences in yield of mar- plant using an EZ-Dose sprayer operating at a pressure of 45 psi. ketable fruit were observed, with an average over all treatments of Foliar sprays were applied with high-clearance sprayer running at 92.96 17.0 fruit and 38.86 3.7 lbs per six-plant plot. No phytotox- 2.3 mph and set up for single row operation with two vertical booms icity was observed for any treatment. * This experiment was supported by industry gifts of pesticide and research funding. V C The Author 2016. Published by Oxford University Press on behalf of the Entomological Society of America. 1 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://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 firstname.lastname@example.org 2 Arthropod Management Tests, 2016, Vol. 41, No. 1 Table 1 Application dates 11-Sep 30-Sep 7-Oct 14-Oct 21-Oct 28-Oct 4-Nov 11-Nov 18-Nov 27-Nov 9-Dec 100 ml 40 gpa 40 gpa 60 gpa 80 gpa 80 gpa 80 gpa 80 gpa 80 gpa 80 gpa 80 gpa Untreated check Rate (oz/acre) Admire Pro 4.6 SC 10.5 oz x Fulﬁll 2.75 oz x Hero 10 oz x x x x x x Malathion 5 EC 32 oz x x x x x x Knack 0.86 EC 10 oz x Oberon 2 SC 10 oz x x MBI206 64 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x MBI206 128 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x MBI206 256 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x SE1 32 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x SE1 64 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x SE1 128 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x SE2 32 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x SE2 64 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x SE2 128 oz x x x x x x x x x x induce 0.25% x x x x x x x x x x Grandevo 1.5 lbs x x x x x x x x x x induce 0.25% x x x x x x x x x x Table 2 Rate (oz/acre) Adults per leaf Nymphs per 4 sq. inches 10-Oct 24-Oct 31-Oct 10-Oct 24-Oct 7-Nov Untreated check 0.50 a 0.53 a 0.59 a 7.35 a 8.25 ab 6.55 bc Admire Pro 4.6 SC 10.5 0.35 d 2.20 c 0.10 d Fulﬁll 2.75 0.03 d 0.00 c 0.03 c Hero 10 Malathion 5 EC 32 Knack 0.86 EC 10 Oberon 2 SC 10 MBI206 64 0.25 b 0.13 bc 0.16 bc 4.00 c 5.05 bc 2.70 cd induce 0.25% MBI206 128 0.13 bcd 0.19 bc 0.13 bc 3.30 c 5.05 bc 7.40 ab induce 0.25% MBI206 256 0.06 cd 0.09 bc 0.06 c 3.50 c 5.10 bc 5.10 bc induce 0.25% SE1 32 0.16 bcd 0.22 b 0.19 bc 4.70 abc 11.65 a 4.75 bc induce 0.25% SE1 64 0.03 d 0.09 bc 0.19 bc 4.55 bc 7.30 b 3.30 bcd induce 0.25% SE1 128 0.03 d 0.13 bc 0.09 c 4.75 abc 5.55 bc 6.55 bc induce 0.25% SE2 32 0.22 bc 0.16 bc 0.16 bc 5.65 abc 8.70 ab 11.35 a induce 0.25% SE2 64 0.16 bcd 0.28 b 0.34 b 7.00 ab 8.65 ab 7.20 ab induce 0.25% SE2 128 0.16 bcd 0.13 bc 0.16 bc 5.50 abc 5.30 bc 5.85 bc induce 0.25% Grandevo 1.5 lbs 0.06 cd 0.25 b 0.16 bc 4.40 bc 7.80 ab 6.95 bc induce 0.25% Means followed by same letter are not statistically different (LSD> 0.05).
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 2016