摘要
本试验对我国北方果园普遍发生、为害较重的果树后期食叶性害虫苹掌舟蛾Phaleraflavescens(Bremer et Grey)的空间分布型和抽样技术进行了初步研究。X^2测验、Taylor指数法则检验,Iwao回归检验式及m~*/X、I等参数的分析结果一致表明,该害虫的分布属聚集型的负二项分布。据此,按Iwao的序贯抽样公式制定了实用调查防治图表。
This paper reports on the study of field distribution pattern and sampling technics of Phalera flavesns (Bremeret Grey) which occurs extensively in orchards in North China and harms fruit trees heavily.The resuits of X2test, Taylor index test, IWAO regression test and the parameters of m*/x and I etc. all indicate that the pest is of negative binomial distribution of gathering type.Thus, a practical control chart has been established on the basis of IWAO'S sampling formula.
出处
《吉林农业大学学报》
CAS
CSCD
1989年第4期1-5,共5页
Journal of Jilin Agricultural University
关键词
苹掌舟蛾
空间分布
抽样
Phalera flavescens, distribution pattern,sampling technics
