大豆菟丝子生物学特性及化学防治技术的研究

通过对菟丝子生物学特性的系统观察和药剂防治试验,发现在大豆播后芽前和苗期的3—5片复叶期,单用或混用25%胺草磷、48%地乐胺进行防治,对菟丝子的防效可达90—95%,还可兼治豆地其它杂草.经生产实践证明有显著的增产效果.

STUDY ON THE BIOLOGICAL CHARACTERISTICS OF DODDER AND ITS CHEMICAL CONTROL

The work was corducted during 1982-1985.The dodder (Cuscuta Chinensis Lam and C. australis R.Br. ) are the mose noxious and parasitic of annualweek of soybean filds in Henan province, distring widely in soybean production area of whole province. There are about 140 thousand hactares of domaged area and cause yild losses can be very severe. The application of biotic pesticide" Lubao-1 " is limiting by weather conditions,and therefore is not very effective.This study about some biological characteristics of the sovbean dodder has been observed in details, the finy ouc effective pesticide and optimum pcriond of applying herbicids. The peseicidc usually shoud be used before sowing or before emergence of the sofore emergence of the soybean seedling and spraying should be done when the seedling are in three to five leave stage. Sue Such as 25% amiprophos and 4% d ibaralla seryed separately or mixedly on the surface of ground and whole plane geve effeets more than 90-95% could be gotten, and also with similar effects on coatrolling of the other weeds. Alarge scaie demonstration of production practices, and the great results of increasing yield were obtained.