Off-campus UNL users: To download campus access dissertations, please use the following link to log into our proxy server with your NU ID and password. When you are done browsing please remember to return to this page and log out.
Non-UNL users: Please talk to your librarian about requesting this dissertation through interlibrary loan.
ADULT CONTROL OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HUBNER), UNDER CONDITIONS OF CENTER PIVOT IRRIGATION IN NEBRASKA
Abstract
Studies were conducted during 1981 and 1982 to evaluate feasibility of reducing larval populations of European corn borer (ECB), Ostrinia nubilalis (Hubner), by reducing adult ECB populations prior to oviposition. Studies were conducted under center pivot irrigation. Treatments consisted to untreated fields (check fields), and aerial applications of insecticide to: (1) non-crop vegetation in field perimeters, pivot lanes and waterways (perimeter treatments); (2) all crop and non-crop vegetation within field boundaries (full-field treatments). Larval populations in fields receiving full-field treatments were always significantly (P = 0.10) lower than those in untreated fields. However, only during 1981 summer moth flights were larval populations in fields receiving perimeter treatments significantly (P = 0.10) lower than those in untreated fields. Results of full-field treatments may have been influenced by a combination of adult and larval control. Results of perimeter treatments may have been influenced by treatment avoidance associated with: (1) treatment timing and (2) moth aggregation in, and immigration from, non-treated vegetation. Six insecticides were bioassayed during 1981 spring moth flights to compare their relative efficacy and residual activity when applied to non-crop vegetation for control of ECB adults. Insecticides bioassayed were dimethoate (Cygon 400), chlorpyrifos (Lorsban 4E), permethrin (Pounce 3.2 EC) and three formulations of carbaryl (Sevimol-4, Sevin 80-WP and Sevin SL). Percent mortality was highest for moths confined on vegetation treated with chlorpyrifos, lowest for moths confined on either dimethoate or permethrin, and intermediate for moths confined on carbaryl. After two days post-application no distinct differences were observed between the various formulations of carbaryl. Based upon these results chlorpyrifos was selected for use in the adult control program.
Subject Area
Entomology
Recommended Citation
BARBER, DAN T, "ADULT CONTROL OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HUBNER), UNDER CONDITIONS OF CENTER PIVOT IRRIGATION IN NEBRASKA" (1983). ETD collection for University of Nebraska-Lincoln. AAI8328157.
https://digitalcommons.unl.edu/dissertations/AAI8328157