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Squash Vine Borer Control, 1992

Squash Vine Borer Control, 1992 Downloaded from https://academic.oup.com/amt/article-abstract/19/1/143/4639338 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 143 PUMPKIN: Cucurbita pepo L. 'Howden' T. G. Teague and C. Stasi (106E) Agricultural Research Melon aphid; Aphis gossypii Glover Arkansas State University P.O. Box 2340 Jonesboro, AR 72467 MELON APHID CONTROL WITH CONFIDOR, 1993: Pumpkin was direct seeded in Calloway silt loam soil on raised beds with 80 inch spacing on 1 Jul at the ASU Research Farm. Plots were 50 ft long, 3 beds wide with 20 ft alleys separating plots. Treatments included applications at planting (AP) or 15 days later; these were either a soil applied sidedress (SD) or a foliar application (F). AP applications were made in a 8 inch band on top of the beds and lightly incorporated ca 1 inch prior to planting. The foliar application was applied using a C0 charged backpack sprayer calibrated to deliver 20 gal/acre at 40 psi through a single hollow cone nozzle. SD applications were made using this sprayer calibrated to deliver 0.69 gal/1000 ft of row. The nozzle was attached to a knife that cut a 1-2 inch deep furrow ca 6 inches from the base of one side of plants. The furrow was covered using a rolling cultivator. All plots received a sidedress of liquid fertilizer (32-0-0); insecticide was included in the fertilizer mixture in one treatment. Application of SD insecticide in water was made on the same side of the plant in the fertilizer application zone. Soil temperature at a 4 inch depth at the time of the SD application was 92°F. The pH values of the Confidor spray mixtures in fertilizer and water were 5.8 and 7.8, respectively. Aphid population densities were determined by examining 2 leafs, 7 to 10 inch diameter, on 5 randomly selected plants/plot. Aphid numbers were moderately high at test initiation, but decreased rapidly as a fungal epizootic became evident at the time of the 3rd sample period. Following applications on 15 Jul, the mean number of aphids/leaf was significantly reduced in all treatments plots receiving insecticide; however, by 3 Aug no differences aphid numbers in SD treatments and the untreated control were evident. Application of Confidor in SD applications with fertilizer did not result in reduction in product efficacy compared to application in water. Benefits to growers adopting this application method include: reduction in number of trips across the field, improvements in timing applications of insecticide, and perhaps reduction in negative indirect environmental effects of foliar applications such as loss of pollinating bees. Aphids/leaf Winged Wingless Rate (AI) 15 Jul 25 Jul 3 Aug 15 Jul 25 Jul 3 Aug Treatment" Furadan (AP) + Metasystox-R (F) 0.225 lbs/1000 ft of row and 0.375 lbs/ac 21.17 b 0.47 c 4.53 a 106.33 b 0.37 c 31.43 b Admire + Fertilizer (SD) 1.3 oz (form.)/1000 ft of row 32.17 a 2.40 b 4.57 a 264.80 a 23.27 c 96.03 a Admire + Water (SD) 1.3 oz (form.yiOOO ft of row 36.07 a 3.77 ab 1.50 b 302.73 a 57.33 b 80.23 a 5.23 a 98.53 a Untreated control 39.43 a 2.23 b 328.43 a 127.27 a Means in the same column followed by the same letter are not significantly different (LSD, P 0.05). "At planting (AP); foliar (F) and sidedress (SD). SQUASH: Cucurbita pepo L. 'Early Prolific Straightneck' J. Boucher, R. Adams, and G. Nixon (I07E) Squash vine borer (SVB); Melittia cucurbitae (Harris) University of Connecticut Cooperative Extension System Agricultural Center P.O. Box 607 Litchfield, CT 06759 SQUASH VINE BORER CONTROL, 1992: 'Early Prolific Straightneck' squash was direct seeded 27 May, in Storrs, Connecticut. Weed control consisted of the stale-seed-bed technique, using paraquat as a pre-plant spray, supplemented by hand and mechanical cultivation. Plots consisted of 12 plants in a single, 24 ft long row, with two ft between plants. An unsprayed guard-row separated each plot. Rows were spaced four ft apart. Six treatments were replicated four times in a randomized complete block design. Treatments consisted of an unsprayed control and applications of Ambush, backpack Asana, Methoxychlor, Rotenone, and Thiodan on 10, 17 and 23 Jul, and 2 Aug. Plots were either sprayed from the top and sides with a C0 sprayer at 30 psi with 40 gallons of water per acre or treated with a hand-cranked duster. Fruits from five plants per plot were harvested, counted and weighed every two to four days from 14 Jul through 1 Sep. These five plants were dissected on 2 Sep and SVB larvae were counted. The SVB population was low and development was delayed due to exceptionally cold, wet weather. Ambush, Asana, Methoxychlor, and Thiodan all significantly reduced SVB larval infestations compared with the untreated control. Despite differences among treatments in SVB larval infestation rates, yields were not significantly increased by any of the insecticide treatments. No phytotoxicity was observed. Mean Mean Mean Rate SVB yield no. (lb AI)/ larvae/ (lb)/ fruits/ Treatment acre plant plant plant Control — 0.9a 5.lab 14.8ab Rotenone 1 D 0.1 0.8a 4.9ab 15.0ab Methoxychlor 2 E 2.0 0.1b 4.5b 13.7b Thiodan 3 EC 0.75 0.0b 5.lab 14.8ab Ambush 2 E 0.15 0.0b 5.3ab 14.2ab Asana XL 0.04 0.0b 6.2a 17.8a Means in a column followed by the same letter are not significantly different (P = 0.05; LSD). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Squash Vine Borer Control, 1992

Arthropod Management Tests , Volume 19 (1) – Jan 1, 1994

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Oxford University Press
Copyright
© 1994, Entomological Society of America
eISSN
2155-9856
DOI
10.1093/amt/19.1.143a
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/19/1/143/4639338 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 143 PUMPKIN: Cucurbita pepo L. 'Howden' T. G. Teague and C. Stasi (106E) Agricultural Research Melon aphid; Aphis gossypii Glover Arkansas State University P.O. Box 2340 Jonesboro, AR 72467 MELON APHID CONTROL WITH CONFIDOR, 1993: Pumpkin was direct seeded in Calloway silt loam soil on raised beds with 80 inch spacing on 1 Jul at the ASU Research Farm. Plots were 50 ft long, 3 beds wide with 20 ft alleys separating plots. Treatments included applications at planting (AP) or 15 days later; these were either a soil applied sidedress (SD) or a foliar application (F). AP applications were made in a 8 inch band on top of the beds and lightly incorporated ca 1 inch prior to planting. The foliar application was applied using a C0 charged backpack sprayer calibrated to deliver 20 gal/acre at 40 psi through a single hollow cone nozzle. SD applications were made using this sprayer calibrated to deliver 0.69 gal/1000 ft of row. The nozzle was attached to a knife that cut a 1-2 inch deep furrow ca 6 inches from the base of one side of plants. The furrow was covered using a rolling cultivator. All plots received a sidedress of liquid fertilizer (32-0-0); insecticide was included in the fertilizer mixture in one treatment. Application of SD insecticide in water was made on the same side of the plant in the fertilizer application zone. Soil temperature at a 4 inch depth at the time of the SD application was 92°F. The pH values of the Confidor spray mixtures in fertilizer and water were 5.8 and 7.8, respectively. Aphid population densities were determined by examining 2 leafs, 7 to 10 inch diameter, on 5 randomly selected plants/plot. Aphid numbers were moderately high at test initiation, but decreased rapidly as a fungal epizootic became evident at the time of the 3rd sample period. Following applications on 15 Jul, the mean number of aphids/leaf was significantly reduced in all treatments plots receiving insecticide; however, by 3 Aug no differences aphid numbers in SD treatments and the untreated control were evident. Application of Confidor in SD applications with fertilizer did not result in reduction in product efficacy compared to application in water. Benefits to growers adopting this application method include: reduction in number of trips across the field, improvements in timing applications of insecticide, and perhaps reduction in negative indirect environmental effects of foliar applications such as loss of pollinating bees. Aphids/leaf Winged Wingless Rate (AI) 15 Jul 25 Jul 3 Aug 15 Jul 25 Jul 3 Aug Treatment" Furadan (AP) + Metasystox-R (F) 0.225 lbs/1000 ft of row and 0.375 lbs/ac 21.17 b 0.47 c 4.53 a 106.33 b 0.37 c 31.43 b Admire + Fertilizer (SD) 1.3 oz (form.)/1000 ft of row 32.17 a 2.40 b 4.57 a 264.80 a 23.27 c 96.03 a Admire + Water (SD) 1.3 oz (form.yiOOO ft of row 36.07 a 3.77 ab 1.50 b 302.73 a 57.33 b 80.23 a 5.23 a 98.53 a Untreated control 39.43 a 2.23 b 328.43 a 127.27 a Means in the same column followed by the same letter are not significantly different (LSD, P 0.05). "At planting (AP); foliar (F) and sidedress (SD). SQUASH: Cucurbita pepo L. 'Early Prolific Straightneck' J. Boucher, R. Adams, and G. Nixon (I07E) Squash vine borer (SVB); Melittia cucurbitae (Harris) University of Connecticut Cooperative Extension System Agricultural Center P.O. Box 607 Litchfield, CT 06759 SQUASH VINE BORER CONTROL, 1992: 'Early Prolific Straightneck' squash was direct seeded 27 May, in Storrs, Connecticut. Weed control consisted of the stale-seed-bed technique, using paraquat as a pre-plant spray, supplemented by hand and mechanical cultivation. Plots consisted of 12 plants in a single, 24 ft long row, with two ft between plants. An unsprayed guard-row separated each plot. Rows were spaced four ft apart. Six treatments were replicated four times in a randomized complete block design. Treatments consisted of an unsprayed control and applications of Ambush, backpack Asana, Methoxychlor, Rotenone, and Thiodan on 10, 17 and 23 Jul, and 2 Aug. Plots were either sprayed from the top and sides with a C0 sprayer at 30 psi with 40 gallons of water per acre or treated with a hand-cranked duster. Fruits from five plants per plot were harvested, counted and weighed every two to four days from 14 Jul through 1 Sep. These five plants were dissected on 2 Sep and SVB larvae were counted. The SVB population was low and development was delayed due to exceptionally cold, wet weather. Ambush, Asana, Methoxychlor, and Thiodan all significantly reduced SVB larval infestations compared with the untreated control. Despite differences among treatments in SVB larval infestation rates, yields were not significantly increased by any of the insecticide treatments. No phytotoxicity was observed. Mean Mean Mean Rate SVB yield no. (lb AI)/ larvae/ (lb)/ fruits/ Treatment acre plant plant plant Control — 0.9a 5.lab 14.8ab Rotenone 1 D 0.1 0.8a 4.9ab 15.0ab Methoxychlor 2 E 2.0 0.1b 4.5b 13.7b Thiodan 3 EC 0.75 0.0b 5.lab 14.8ab Ambush 2 E 0.15 0.0b 5.3ab 14.2ab Asana XL 0.04 0.0b 6.2a 17.8a Means in a column followed by the same letter are not significantly different (P = 0.05; LSD).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1994

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