MN - Vegetable IPM Newsletter

Table 1. Selected insecticide efficacy against black cutworm, 1988-99¹

Treatment

Rate
(lb AI/acre)

Rate
(Prod. -- fl oz/acre)

#Trials

% Control (range) ²
Ambush 0.10 6.4 5 78 (66-88)
Asana XL 0.03 5.8 2 94 (88-100)
Baythroid 2 0.025 1.6 2 83 (81-84)
Baythroid 2 0.030 1.9 2 94 (87-100)
Lorsban 4E 1.00 32.0 6 77 (44-88)
Pounce 3.2 EC 0.025 1.0 2 83 (80-85)
Pounce 3.2 EC 0.100 4.0 5 87 (79-100)
Pounce 3.2 EC 0.150 6.0 3 65 (41-100)
Warrior T 0.015 1.92 3 78 (76-79)
Warrior T 0.020 2.56 6 83 (59-98)
Warrior T 0.025 3.2 1 92 (--)
Warrior T 0.030 3.84 1 90 (--)

¹ Data based on studies conducted by Bessin (1999, KY), Shaw et al. (1996, IL), Gray et al. (1998, IL), Willson et al. (1999, OH), Oloumi-Sadeghi and Levine (1991, IL), Ostlie et al. (1992, MN), Chaddha et al. (1990, MN), Chaddha and Ostlie (1989, MN), and Berry (1988, IA).

² Percentage (%) control defined as reduction in cutting or feeding injury to corn seedlings, compared to the untreated check plots; rescue spray timing varied from 0 to 4 days, following natural or artificial infestations of black cutworm larvae.

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Reference to products in this publication is not intended to be an endorsement to the exclusion of others which may have similar uses. Any person using products listed in this publication assumes full responsibility for their use in accordance with current directions of the manufacturer

Last Revised June 6, 2001.
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