A PRELIMINARY STUDY ON THE VERTICAL DISTRIBUTIONOF THE FIRST GENERATION EGG MASSES OF ASIANCORN BORER IN SPRING CORN FIELDS
玉米螟一代卵块在春玉米田垂直分布规律的探讨

The paper deals with the vertical distribution of the first generation egg ma- sses of Asian corn borer, Ostrinia furnacalis (Guenee), in the spring corn fields.The vertical distribution of the first generation egg masses in the spring corn fields fundamentally belongs to an aggregated distribution pattern (mainly mosaic distribution pattern) just as the horizontal distribution. The first generation egg masses of the corn borers are distributed mainly over the range between the 1st leaf and the 5th leaf ben...