J. Sirota, E. Grafius, B. Ferrari, P. Kolarik, B. Scriber, S. Simstad, W. Boylan-Pett
{"title":"Control of Colorado Potato Beetle with Trigard, 1991","authors":"J. Sirota, E. Grafius, B. Ferrari, P. Kolarik, B. Scriber, S. Simstad, W. Boylan-Pett","doi":"10.1093/iat/18.1.155","DOIUrl":null,"url":null,"abstract":"\n Two fields in Bay Co., MI, were selected for trials using the insect growth regulator Trigard against CPB. ‘Onaway’ potatoes were planted on 17 Apr 1991, and 3 May 1991, respectively, and were managed by growers Brian Hugo and Jim Kryszak. Plots measuring 14 rows wide by 60 feet long were established in each field on 7 Jun in a randomized complete block design with 4 replications. Treatments were: 0.125 lb (AI)/acre (low rate); 0.25 lb (AI)/acre (medium rate); and 0.375 lb (AI)/acre (high rate; and an untreated control. The fields were sprayed on 7 and 19 Jun using a tractor mounted boom sprayer at 25 gal/acre and 40 psi. A maintenance spray program using insecticides effective against adult beetles was started on all plots the second week of Jul, after the summer adults had emerged. A pre-spray count of CPB egg masses, adults, and small and large larvae from one or two plants per plot was taken on 7 Jun. High numbers of large larvae were already present in the Hugo field at this time. Four plants per plot were sampled on 13, 20, 27 Jun and 2 Jul. On 2 Jul a qualitative defoliation rating was given to each plot based on the percent of plants in each of five defoliation categories. Potatoes were harvested from two 10-ft sections of row per plot in 19 Aug, sized and weighed.","PeriodicalId":13691,"journal":{"name":"Insecticide and Acaricide Tests","volume":"22 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Insecticide and Acaricide Tests","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1093/iat/18.1.155","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Two fields in Bay Co., MI, were selected for trials using the insect growth regulator Trigard against CPB. ‘Onaway’ potatoes were planted on 17 Apr 1991, and 3 May 1991, respectively, and were managed by growers Brian Hugo and Jim Kryszak. Plots measuring 14 rows wide by 60 feet long were established in each field on 7 Jun in a randomized complete block design with 4 replications. Treatments were: 0.125 lb (AI)/acre (low rate); 0.25 lb (AI)/acre (medium rate); and 0.375 lb (AI)/acre (high rate; and an untreated control. The fields were sprayed on 7 and 19 Jun using a tractor mounted boom sprayer at 25 gal/acre and 40 psi. A maintenance spray program using insecticides effective against adult beetles was started on all plots the second week of Jul, after the summer adults had emerged. A pre-spray count of CPB egg masses, adults, and small and large larvae from one or two plants per plot was taken on 7 Jun. High numbers of large larvae were already present in the Hugo field at this time. Four plants per plot were sampled on 13, 20, 27 Jun and 2 Jul. On 2 Jul a qualitative defoliation rating was given to each plot based on the percent of plants in each of five defoliation categories. Potatoes were harvested from two 10-ft sections of row per plot in 19 Aug, sized and weighed.