Comparative Persistence of the Ovicidal Activity of Thiodicarb, Chlordimeform, and Methomyl Against Heliothis spp. (Lepidoptera: Noctuidae) on Cotton1
- 1 April 1988
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 81 (2) , 705-708
- https://doi.org/10.1093/jee/81.2.705
Abstract
A 2-yr study was conducted to determine ovicidal effectiveness of thiodicarb against Heliothis spp. in cotton in North Carolina, and to compare it with two standard ovicides, methomyl and chlordimeform. At 0.14 kg (AI)/ha, all materials caused high mortality to eggs collected 2 h after spray, with chlordimeform showing the most activity and greatest persistence, and methomyl persisting the shortest time. Higher rates of thiodicarb up to 0.67 kg (AI)/ha caused greater mortality and longer residual activity, but not at consistent levels both years. Under proper field conditions, ovicidal activity of thiodicarb should persist up to 4 d after application.Keywords
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