用Trigard控制马铃薯甲虫,1991

J. Sirota, E. Grafius, B. Ferrari, P. Kolarik, B. Scriber, S. Simstad, W. Boylan-Pett
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引用次数: 0

摘要

在密歇根州贝公司的两个地区,选择了使用昆虫生长调节剂Trigard对抗CPB的试验。“Onaway”马铃薯分别于1991年4月17日和1991年5月3日种植,由种植者Brian Hugo和Jim Kryszak管理。6月7日,采用4个重复的随机完全区组设计,在每个地块建立14行宽、60英尺长的地块。处理为:0.125磅(AI)/英亩(低剂量);0.25磅(AI)/英亩(中速);和0.375磅(AI)/英亩(高速率;和未经治疗的对照组。6月7日和19日,使用拖拉机悬挂式喷雾器,以25加仑/英亩和40 psi的压力对该油田进行了喷洒。在7月的第二周,夏季成虫出现后,在所有地块上开始使用对成虫有效的杀虫剂进行维持喷雾计划。6月7日对每块地一株或两株CPB卵团、成虫和大小幼虫进行喷雾前计数。此时Hugo田间已经出现大量大型幼虫。在6月13日、20日、27日和7月2日,每个样地取样4株。7月2日,根据5个落叶类别中每个类别的植物百分比对每个样地进行定性落叶评级。8月19日,每行10英尺的两段土豆被收获,大小和称重。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Control of Colorado Potato Beetle with Trigard, 1991
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.
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