论文部分内容阅读
看麦娘(Alopecurus ceequalis sobol.)是我县稻茬油菜田的主要草害.据1986～1987年399块田普查,每年约有61.65%的田块受害较重,损失大大超过病、虫的为害.近年来,我县开始推广化学防除,然而个别年份或田块,防效不太理想,或保苗效果较差,究其原因是没有弄清该草的发生规律及生物学特性。为了科学地开展化除工作,1989～1991年,我们对这一杂草的出苗、分蘖、开花、结实习性作了初步观察,并据此提出了合理的化除对策,现将结果报道如下:
Alopecurus ceequalis sobol. Is the main grass-weed in the Rapeseed rice field in our county.According to the 399 plots survey from 1986 to 1987, about 61.65% of the plots were severely damaged each year and the loss greatly exceeded that of disease and insect Damage .In recent years, my county began to promote chemical control, however, individual years or plots, control effect is not ideal, or seedlings less effective, the reason is not clear the law of occurrence and biological characteristics of the grass. In order to scientifically carry out the removal work, from 1989 to 1991, we made preliminary observations on the emergence, tillering, flowering and seedling habits of this weed, and put forward reasonable countermeasures for its removal. The results are reported as follows: