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CONTROL OF FLEA BEETLE AND GREEN PEACH APHID ON BROCCOLI, 2006

CONTROL OF FLEA BEETLE AND GREEN PEACH APHID ON BROCCOLI, 2006 (E1) BROCCOLI: Brassica oleracea (L.) ‘Windsor’ Casey W. Hoy Department of Entomology Ohio Agricultural Research and Development Center, The Ohio State University Wooster, OH 44691 Phone: (330) 263-3611 Fax: (330) 263-3686 E-mail: hoy.1@osu.edu Michael J. Dunlap Department of Entomology Ohio Agricultural Research and Development Center, The Ohio State University Wooster, OH 44691 Phone: (330) 263-3649 Fax: (330) 263-3686 E-mail: dunlap.2@osu.edu Fleabeetle: Phyllotreta cruciferae Goeze, Phyllotreta stiolata (Fabricius) Aphid: Myzus persicae (Sulzer) 'Windsor' broccoli was planted at the Muck Crops Agricultural Research Station, Celeryville, OH, on 6 Sep using a Stanhay Precision planter. The experimental plots were 2 rows wide on 18 inch centers, 13 ft long and separated by 6 ft alleys with 5 ft between replicates. Each treatment was replicated four times in a RCB design. Dual Magnum 1.33 pts/acre was applied as a pre-emergent herbicide. Treatments were applied 14, 21, and 27 Sep using a CO compression backpack sprayer at 50 psi with a 8003 flat fan nozzle delivering 50 gpa. Penetrator Plus was added to each tank mix at a rate of 0.5% v/v. Ten plants were randomly selected from each plot and inspected for total cumulative number of flea beetle feeding holes and number of aphids per plant on 19, 25 Sep, and 3 Oct. Data were analyzed by Tukey’s HSD and by a set of orthogonal contrasts: treatments vs. untreated, Capture vs. BAS 320 00I treatments, higher vs. lower rate of BAS 320 00I. Results were the same for both mean comparison tests so only Tukey’s HSD is presented. All treatments resulted in significant reductions of flea beetle feeding holes after the first evaluation date, and no significant differences were observed among the insecticide treatments. All treatments resulted in a statistically significant but small reduction of aphids on the 25 Sep evaluation date only. Avg. no. FB holes/plant Avg. no. aphids/plant Treatment Rate/acre 19 Sep 25 Sep 3 Oct 19 Sep 25 Sep 3 Oct BAS 320 00I (240 g(AI)/liter) 13.7 fl oz 0.53 0.80 0.75 4.60 5.33 6.18 BAS 320 00I (240 g(AI)/liter) 16.0 fl oz 0.60 0.38 0.25 5.68 4.25 4.70 Capture 2 EC 4.0 fl oz 0.45 0.40 0.18 4.75 5.33 4.60 Untreated --- 0.75 1.93 4.30 5.38 8.18 6.45 Tukey’s HSD(α = 0.05) 0.98 1.03 1.51 2.97 2.61 2.80 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CONTROL OF FLEA BEETLE AND GREEN PEACH APHID ON BROCCOLI, 2006

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10.1093/amt/32.1.E1
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Abstract

(E1) BROCCOLI: Brassica oleracea (L.) ‘Windsor’ Casey W. Hoy Department of Entomology Ohio Agricultural Research and Development Center, The Ohio State University Wooster, OH 44691 Phone: (330) 263-3611 Fax: (330) 263-3686 E-mail: hoy.1@osu.edu Michael J. Dunlap Department of Entomology Ohio Agricultural Research and Development Center, The Ohio State University Wooster, OH 44691 Phone: (330) 263-3649 Fax: (330) 263-3686 E-mail: dunlap.2@osu.edu Fleabeetle: Phyllotreta cruciferae Goeze, Phyllotreta stiolata (Fabricius) Aphid: Myzus persicae (Sulzer) 'Windsor' broccoli was planted at the Muck Crops Agricultural Research Station, Celeryville, OH, on 6 Sep using a Stanhay Precision planter. The experimental plots were 2 rows wide on 18 inch centers, 13 ft long and separated by 6 ft alleys with 5 ft between replicates. Each treatment was replicated four times in a RCB design. Dual Magnum 1.33 pts/acre was applied as a pre-emergent herbicide. Treatments were applied 14, 21, and 27 Sep using a CO compression backpack sprayer at 50 psi with a 8003 flat fan nozzle delivering 50 gpa. Penetrator Plus was added to each tank mix at a rate of 0.5% v/v. Ten plants were randomly selected from each plot and inspected for total cumulative number of flea beetle feeding holes and number of aphids per plant on 19, 25 Sep, and 3 Oct. Data were analyzed by Tukey’s HSD and by a set of orthogonal contrasts: treatments vs. untreated, Capture vs. BAS 320 00I treatments, higher vs. lower rate of BAS 320 00I. Results were the same for both mean comparison tests so only Tukey’s HSD is presented. All treatments resulted in significant reductions of flea beetle feeding holes after the first evaluation date, and no significant differences were observed among the insecticide treatments. All treatments resulted in a statistically significant but small reduction of aphids on the 25 Sep evaluation date only. Avg. no. FB holes/plant Avg. no. aphids/plant Treatment Rate/acre 19 Sep 25 Sep 3 Oct 19 Sep 25 Sep 3 Oct BAS 320 00I (240 g(AI)/liter) 13.7 fl oz 0.53 0.80 0.75 4.60 5.33 6.18 BAS 320 00I (240 g(AI)/liter) 16.0 fl oz 0.60 0.38 0.25 5.68 4.25 4.70 Capture 2 EC 4.0 fl oz 0.45 0.40 0.18 4.75 5.33 4.60 Untreated --- 0.75 1.93 4.30 5.38 8.18 6.45 Tukey’s HSD(α = 0.05) 0.98 1.03 1.51 2.97 2.61 2.80

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2007

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