大豆食心虫卵空间格局与落卵规律研究

用几种理论模型进行模拟,结果表明:大豆食心虫卵的空间格局符合负二项分布,在各种密度水平下,为普通聚集型,分布的基本成份是疏松的个体群,个体群的大小均为6株,约0.5cm~2。其理论抽样数可由公式N=281.1871x~(-0.693)确定。大豆食心虫成虫产卵有选择性,在荚长3.1～4.1cm即8～13日龄和离地面25.3～32.3cm上下高度的豆荚上有卵频次最多。分析了空间格局参数特征和与其生物学特性的关系,并探讨了在实际中的应用。

Study of Spatial Pattern of eggs of Leguminivora glycinivorella (Matsumura) (Lepidoptera: Tortricidae)

Spatial pattern of eggs of Leguminivora glycinivorella was studied. The results showed thatthe spatial pattern of eggs tallied with negative binomial distribution and was a general aggregatepattern under all kinds of densities. The eggs of L. glycinivorella occured as loose colonies of about6 plants. The theoretic sampling number could be determined by the formula N=281.1871?~(-0.693). The adults of L. glycinivorella liked to lay eggs on bean pods of 8 to 13 days about3. 1 to 4.6 centimeter long and about 32 centimeter high.