摘要
通过５年的日本松干蚧发生期系统观测资料，运用数理统计方法，计算出日本松干蚧同一虫态和不同虫态的理论期距值和平均数标准差。结合生产防治，建立了固定若虫期一元回归预测式。方法简便。
A practical and easy using method of forecasting outbreak of Matsucoccus matsumurae was put forward in this paper. With systematic observation of outbreak time of this insect in five years, expected distance values and mean standard errors of different instars were calculated. Meanwhile, a linear regressive equation was established and used in insect control practice.
出处
《辽宁林业科技》
1999年第1期31-34,共4页
Liaoning Forestry Science and Technology
