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Downloaded from https://academic.oup.com/amt/article-abstract/22/1/128/4640108 by DeepDyve user on 21 July 2020 128 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROP COR N (SWEET): Zea mays L. 'Jubilee' John Wedberg, Bryan Jensen (50E European corn borer (ECB); Ostrinia nubilalis (Hiibner) Department of Entomology Corn earworm (CEW); Helicoverpa zea (Boddie) 1630 Linden Dr. Madison, WI 53706 (608) 262-1696 US E OF LABELED AND EXPERIMENTAL INSECTICIDES FOR CONTROL OF EUROPEAN CORN BORER AND CORN EARf WOR M ON SWEET CORN, 1996: 'Jubilee' sweet corn was planted at the Arlington Agricultural Research Station, Arlington, WI at 23,000 seeds pe | acre on 24 Jun. Each treatment was 6 rows wide and 60 ft long, arranged in a RCB design and replicated four times. The sprays were applied 21, 26 Au^ and 3, 10 Sep. All treatments were applied with a high clearance sprayer equipped with D2/23 TeeJet disc-core nozzles and delivered 10.3 gallons of fin* ished spray per acre at 40 psi when driven at 2.5 MPH. Plots were evaluated 18 Sep by removing 25 ears per treatment and recording the number of dam4 aged ears and of the larvae present in different developmental stages. All treatments had significantly more undamaged ears than the untreated check. There were no significant differences between treatments for num* ber of early and late ECB and early CEW. However, each treatment had significantly fewer mid ECB larvae than the untreated check. All treatments had fewer mid-CEW except Penncap-M 2 FM at the 0.50 rate and late CEW, except TD-2351-04 4FM at the 0.50 rate. No phytotoxicity was observed. Mean no./25 ears Treatment/ Rate Early Mid- Late Early Mid- Late C rf formulation lb (AI)/acre Undamaged ears ECB" ECB* ECB CEW CEW* CEW/ TD-2344-02 0.83 E 0.025 20.75 fgh 0.50 a 0.75 ab 0.25 a 0 a 1.25 ab 0.75 ab TD-2344-02 0.83 E 0.035 21.25 fghi 0 a 1.25 ab 0 a 0.25 a 0.75 ab 0.50 ab TD-2351-01 4F M 0.50 18.25 cd 0 a 0.75 ab 0.25 a 0.75 a 1.75 ab 0.25 a TD-2351-02 4F M 18.25 cd 1.00 ab 0.50 a 1.00 a 2.00 a 1.00 ab 0.50 0.75 a TD-2351-04 4 FM 16.25 b 0.75 ab 1.00 a 0.25 a 1.75 ab 2.00 be 0.50 1.00 a Penncap-M 2 FM 17.75 cd 0.50 a 1.75 b 0.50 a 0.25 a 1.75 ab 1.50 ab 0.50 Penncap-M 2 FM 17.00 be 1.75 a 0.75 ab 0 a 0.50 a 2.75 be 1.25 ab 0.25 Penncap-M 2 FM + 21.75 ghij 0.25 a 0 a 0 a 0 a 0.25 a 0.75 ab 0.25 TD-2344-02 0.83 E 0.025 Mustang 1.5 EC 0.0375 21.25 fghi 1.00 a 0 a 0.25 a 0.75 a 0.75 ab 0.25 a Mustang 1.5 EC 0.050 23.00 jklm 0.25 a 0.25 ab 0.25 a 0.25 a 0.50 a 0.25 a Capture 2 EC 0.025 24.00 m 0.25 a 0 a 0 a 0 a 0.25 a O a Capture 2 EC 0.03 23.50 lm 0 a 0 a 0 a 0.25 a 0.50 a O a Capture 2 EC 0 a 0 a 0.50 a 0.04 23.75 m 0 a 0.25 a O a Talstar0.67F + 0.50 a 0.50 a 0.50 a 0.03 22.00 hijk 0.25 ab 0 a O a Bond 1 pint/100 gallons Talstar0.67F + 0.04 22.25 ijkl 0.25 a 0.75 ab 0.75 a 0 a 0.5 a 1.00 ab Bond 1 pint/100 gallons 0.15 19.00 de 0 a 1.00 ab 0.25 a 0.75 ab 1.25 ab Pounce 3.2 EC 0 a Pounce 3.2 EC 0.20 23.25 klm 0 a 0.25 ab 0 a 0.50 a 0.25 a 0.25 a Ambush 2 EC 0.15 20.50 fg 0.25 a 0.50 ab 0 a 1.75 ab 0.25 a 0.75 a Warrior 1 EC 0.02 23.75 m 0.75 a 0.50 ab 0 a O a O a 0.25 a Warrior 1 EC 0.025 23.00 jkl m 0 a 0 a 0 a 0.75 ab O a O a Baythroid 2 EC 0.025 24.00 m 0.33 a 0 a 0.33 a 0.33 a O a O a Baythroid 2 EC 0.031 20.00 ef 0 a 0.25 a 0.25 a 1.00 ab 1.25 ab 0.50 a 20.75 fgh 0.50 a 0.50 a Baythroid 2 EC 0.0375 0.25 a 0.75 ab 0.75 ab 0.50 ab 8.00 a 3.00 a 3.25 a Untreated check 10.00 c O a 4.25 c 3.25 c Means within a column followed by the same letter are not significantly different (P • 0.05; DMRT). "Larvae between 1/8 and 1/4 inch long. *Larvae longer than 1/4 but shorter than 1/2 inch. Larvae longer than 1/2 inch. ''Larvae less than 1/2 inch long. "Larvae longer than 1/2 inch but shorter than 3/4 inch. /Larvae longer than 3/4 inch.
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 1997
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