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湿度往往是昆虫种群数量变化的主导条件,近来普遍开展了此项研究工作。但一般较简单的实验方法仅散见于发行量很少的国外期刊或小册子中。现稍加整理后介绍,个别点上加以补充。一、定湿用鹽溶液在与大气隔离的密閉容器中,根据彼得遜昆虫研究法手冊(53年版),有不同盐类飽和溶液和氢氧化鉀不同浓度溶液兩个方法。以30升瓶装,25毫升溶液,在室温24℃,相对湿度25—40％时,瓶內空間所示相对湿度如下:
Humidity is often the predominant condition for changes in the number of insect populations and has recently been widely studied. However, the simpler experimental methods are only found in foreign periodicals or brochures with a small circulation. Is a little finishing after the introduction of individual points to be added. A set of wet salt solution In a closed container isolated from the atmosphere, according to Peterson’s insect research manual (53 version), there are two different methods of saturated solution of salt and different concentrations of potassium hydroxide solution. In a 30 liter bottle, 25 ml of solution, at room temperature 24 ° C, relative humidity 25-40%, the relative humidity in the bottle space is as follows: