Field Evaluation of Early Season Fungicide Substitutions on Tetranychid Mites and the Predators Neoseiulus fallacis and Agistemus fleschneri in Two Missouri Apple Orchards12
- 15 October 1975
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 68 (5) , 719-724
- https://doi.org/10.1093/jee/68.5.719
Abstract
Statistically significant differences among treatment means for tetranychid mites and the predators Neoseiulus fallacis (Garman) and Agistemus fleschneri Summers were shown by substituting a single fungicide in early season while maintaining an otherwise complete pesticide spray schedule on apple trees. The fungicides benomyl, sulfur, and dodine were used until July 9 and 17, respectively, in 2 orchards followed by uniform applications of captan in all treatment blocks. Benomyl and sulfur were toxic to both N. fallacis and A. fleschneri . Dodine was innocuous to N. fallacis . Minimizing early season mortality of either N. fallacis or A. fleschneri is necessary for effective tetranychid suppression. This appears to be even more critical under Missouri growing conditions due to higher temperatures during May and June as compared with more northern states.Keywords
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