卵圆蝽若虫抽样方法及个体群面积的研究

Studies on Sampling Method and Individual Population Area of Nymph of Hippota dorsalis(Stal.)

对卵圆蝽越冬后上竹若虫抽样方法及个体群面积的研究表明:采用分层抽样法调查简单、实用;抽样株数最少;所得均数与总体真实均数最接近。调查时,可根据不同的要求,确定不同的抽样数,当抽样数为总体的千分之二十六时,可靠性为86.2%;当抽样数达到总体的千分之三十七时,可靠性可达97.3%。卵圆蝽若虫在林间呈聚集分布,其个体群面积为1～2株竹大小。

Sampling method and individual population area of the overwintering nymphof Hippota dorsalis (Stal.) were studied and the results indicated that stratified samplingmethod was simple and practice, the sampling number was the fewest, and the meancalculated was very closed to actual total mean. The different sampling number was determ-ined based on the different demand, and the reliability was 86.2% and 97.3% when thesampling number was 2. 6% and 3. 7% of total number, respectively. The nymph of H. dorsa-lis was aggregation distribution in the bamboo forest and the individual population area was1-2 bamboo plant.