Evaluation of Entomogenous Nematodes and Conventional Formulations to Control Pine Root Collar Weevil on Scotch Pine in Bedford County, Pennsylvania, 1991

P. R. Heller, R. Walker
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引用次数: 0

Abstract

Eleven treatments were applied to evaluate control of pine root collar weevil on heavily infested 8-12 ft Scotch pine Christmas trees. Individual treatments were applied to replicates after the duff below each tree was removed and bare ground was exposed. Liquid formulations were applied at the rate of 312 gal/acre (946 ml/tree) with a C02 compressed air sprayer with one 8004VS Teejet nozzle mounted on a 24 inch boom operating at 28 psi. Treatments were arranged in a randomized complete block design, replicated four times. The following conditions existed on 15 May: clear skies; air temperature, 90°F; water pH, 7.0; and RH, 39%. Each tree was dug and burlapped at the field site on 14 Nov, loaded into a rental truck, and returned to the laboratory. Each tree was thoroughly examined by removing all the bark from the root collar areas and lateral roots to record the presence of larvae. The soil ball was examined for the presence of larvae and adults.
1991年美国宾夕法尼亚州贝德福德县苏格兰松上虫生线虫和常规制剂防治松根颈象鼻虫的评价
在8-12英尺苏格兰松圣诞树上,采用11种处理对松根颈象鼻虫的防治效果进行了评价。每棵树下的枯草去除,裸露地面暴露后,对重复进行个别处理。液体配方的应用速度为312加仑/英亩(946毫升/棵),二氧化碳压缩空气喷雾器配有一个8004VS Teejet喷嘴,安装在24英寸的动臂上,工作压力为28 psi。处理采用随机完全区组设计,重复4次。5月15日的情况如下:天空晴朗;空气温度,90°F;水pH, 7.0;RH为39%。11月14日,每棵树都在现场挖好,打好,装上一辆租来的卡车,然后运回实验室。每棵树都被彻底检查,从根颈区和侧根处去除所有树皮,记录幼虫的存在。检查土球是否有幼虫和成虫。
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