论文部分内容阅读
棉虫防治的根本办法本应該是消灭棉虫于棉田之外,在其越冬期間一举而歼灭,不让棉虫浸入棉田內,对棉花稍有損害。不过在目前的技术水平下,在棉田內仍得进行相应的防治工作。同时由于棉虫已經进入棉田,危险万分,偶一不慎,就会招致棉产的亘大損失;如果步步設防,刻刻戒备,經常的投入大量人力及药械与棉虫搏斗时,不唯条件不許可,也沒有必要,还不一定能获得滿意效果。因此如何能夠“打巧战”,即充分的掌握了棉虫的发生发展規律,以少量的人力及药械,左最有利的时机进行防治工作,而达到最有效的防治目
The basic approach to the prevention and control of cotton insects should be to eliminate the cotton insects in the cotton field, during its wintering in one fell swoop and annihilated, so that insects do not let cotton insects within the cotton, cotton slightly damaged. However, at the current technical level, the corresponding prevention and control work still needs to be carried out in cotton fields. At the same time as cotton insects have entered the cotton fields, extremely dangerous, accidentally, it will lead to immense loss of cotton; if step by step fortified, engraved on alert, often put a lot of manpower and medicine and cotton insects wrestling, not only Conditions are not allowed, there is no need, may not be able to obtain satisfactory results. Therefore, how to “play fights”, that is, fully grasp the occurrence and development of cotton insects, with a small amount of manpower and equipment, left the most favorable time for prevention and control work, and to achieve the most effective prevention and treatment