caa a22 4500 397571399 CHVBK 20180308164842.0 cr unu---uuuuu 161202e19961001xx s 000 0 eng 10.1093/ee/25.5.933 doi (NATIONALLICENCE)oxford-10.1093/ee/25.5.933 Population Changes of Spider Mites (Acari: Tetranychidae) Following Insecticide Applications in Corn [Elektronische Daten] [Ramesh Ayyappath, John F. Witkowski, Leon G. Higley] Applications of 2 insecticides, methyl parathion and permethrin, for the control of 1st- and 2nd-generation European corn borer, Ostrinia nubilalis (Hübner), in corn, Zea mays (L.), were evaluated in 1992, 1993, and 1994 for their effects on the population densities of twospotted spider mites, Tetranychus urticae Koch, Banks grass mites, Oligonychus pratensis (Banks), and selected mite predators such as predatory mites, lady bird beetles, pirate bugs, predatory thrips, lacewings, and spiders. Results indicated that applications of permethrin during the last week of July or early August were associated with a significant increase in the population of twospotted spider mites. However, no consistent increases in the population of Banks grass mites were observed. Predator populations were generally low throughout the study period, and no significant changes in the population of identified predators were observed between pretreatment and posttreatment sampling. © 1996 Entomological Society of America Pest Management and Sampling nationallicence spider mites nationallicence outbreaks nationallicence predators nationallicence insecticides nationallicence Ayyappath Ramesh Cornell University, Department of Entomology, Insectary Building, Ithaca, NY 14853-0999 aut Witkowski John F. 2To whom reprint requests should be addressed: University of Nebraska, Northeast Research and Extension Center, Box 111, Concord, NE 68728-0111. aut Higley Leon G. University of Nebraska, Deptartment Of Entomology, 201 B Plant Industry, Lincoln, NE 68583-0816 aut Environmental Entomology Oxford University Press 25/5(1996-10-01), 933-937 0046-225X 25:5<933 1996 25 ee https://doi.org/10.1093/ee/25.5.933 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.5.933 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ayyappath Ramesh Cornell University, Department of Entomology, Insectary Building, Ithaca, NY 14853-0999 aut NATIONALLICENCE 700 1- Witkowski John F. 2To whom reprint requests should be addressed: University of Nebraska, Northeast Research and Extension Center, Box 111, Concord, NE 68728-0111 aut NATIONALLICENCE 700 1- Higley Leon G. University of Nebraska, Deptartment Of Entomology, 201 B Plant Industry, Lincoln, NE 68583-0816 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/5(1996-10-01), 933-937 0046-225X 25:5<933 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford