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旱地作物地区,害虫种类复杂,预测灯是多种害虫共用的预测工具之一。为了确定夜间点诱时间,我们在1959年选择多种害虫成虫盛发时期,观察了不同时间主要害虫的出现数量,择要整理如下。 一、观察方法 利用20瓦黑光灯一个,自8月6日至15日连续观察10夜,每天自天黑前(7时半)至天明后(5时)定时更换毒瓶(由9时至次晨5时,每一小时换一次),分别记载虫种和诱获数量,有的害虫按性别分记。观察期间,天气基本正常,只有11—12日夜晚天阴,13日上半夜细雨、下半夜阴,其余7夜天气晴好,有时有3—4级风。10日以前,每晚上半夜有逐日加长的弱月光,14—15日上半夜至下半夜2—3时有明亮的月光。平均气温黄昏9时为27.1℃,晨5时为22.9℃,每小时约降低0.5℃左右,平均相对湿度9时为70％,晨5时88％,每小时增加0—4％不等。
Dryland crop areas, complex species of pests, and predictive lights are one of the tools for predicting the common use of multiple pests. In order to determine the time of night lure, we chose a variety of pests in 1959 during the period of full bloom, the main pests observed at different times the number of occurrence, the need to organize as follows. First, the observation method using a 20-watt black light, from August 6 to 15 consecutive observation of 10 nights every day from before dark (7:30) to day after tomorrow (5:00) regularly change the bottle (from 9 am to The next morning at 5:00, once every hour), were recorded insects and the number of seizures, some pests according to gender. During the observation period, the weather basically normal, only 11-12 days of the night overcast, midnight on the 13th drizzle, midnight yin, the rest of the night seven sunny, and sometimes 3-4 grade wind. 10 days ago, every night in the middle of the night has a weak moonlight lengthening, 14-15 on the middle of the night to 2-3 midnight have a bright moonlight. The average temperature is 27.1 ℃ at 9 in the evening and 22.9 ℃ in the morning and 0.5 ℃ in the hour. The average relative humidity is 70% at 9 o’clock, 88% at 5 o’clock in the morning and 0-4% at the hour.