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九江市棉花生产,由解放初期常年约10万亩左右发展到63万亩,单产由20来斤提高到130斤,从1950年到1983年的34年中,就单产而言,增产18年,减产16年,仅有六年单产在80斤以上(其中两年过百斤),很多年份单产在60到70斤左右徘徊。出现这种状况,除耕作制度不够合理,土壤肥力有所减退,良种选育未跟上以外,有些年份没有把住治虫关,也是我市棉花单产不高、不稳的重要原因之一。要做好棉花防虫工作,必要贯彻“预防为主、综合防治”的植保方针,坚持不以消灭害虫为目标,而以控制害虫为害程度在经济允许水平以下为目标的防治策略,把生防和化防协调起来,栽培和防虫结合起来,达到经济有效地控制害虫的目的。
Jiujiang City, cotton production, from the perennial about 10 million mu of perennial liberation to 630,000 mu, yield increased from 20 pounds to 130 pounds, from 1950 to 1983, 34 years, in terms of yield, an increase of 18 years, Cut production for 16 years, only six years of yield more than 80 pounds (of which two hundred pounds over), many years yield hovering around 60 to 70 pounds. In addition to the tillage system is not reasonable enough, soil fertility has declined, fine breeding did not keep up, some years did not live the control of insects, but also the city cotton yield is not high, one of the important reasons for instability. In order to do a good job in cotton pest control, it is necessary to implement the policy of “prevention first and comprehensive prevention and cure” and insist on a strategy of prevention and control that aims not to eliminate pests but to control pest damage below the allowable economic level. Coordination, cultivation and pest control together to achieve the purpose of economic and effective pest control.