论文部分内容阅读
蕪湖地区是我省水稻主要产区,但因螟虫为害,每年都有不同程度的减产。当地水稻栽培制度原为中熟和稻区,中稻与油荣、綠肥、大小麦輪作,或冬漚休閑,螟害以麦茬迟中稻严重,白穗率一般为10—30%,重的达74.8%,損失很大。1955年耕作制度改变,冬作及双季稻面积扩大,早、中、晚稻都有,螟害更加猖獗,其中双季連作晚稻及迟栽单季晚稻受害最重,一般枯心率10—20%,最高达65.9%,是全省的重螟区。因此,現将我所对蕪湖地区水稻螟虫发生消长規律及防治研究結果初步整理如下,供作制定治螟措施的参考。
Wuhu region is the main rice producing areas in our province, but because of stem borers damage, every year, different degrees of reduction. The local rice cultivation system was originally middle-maturity and rice area, middle rice and oil wing, green manure, wheat rotation, or winter 沤 leisure, stubble to wheat stubble late middle serious rice, white spike rate is generally 10-30%, weighing up to 74.8 %, Great loss. In 1955, the tillage system was changed. The winter and double cropping rice areas were expanded. There were both early, middle and late rice and the stem borers were more rampant. Among them, the double cropping continuous late rice and the delayed late rice were the worst, , Up to 65.9%, is the province of the drill stem borer area. Therefore, now my study on the growth and decline of rice stem borers in Wuhu region and the preliminary results of the prevention and control are as follows, for the formulation of a reference for the management of borer measures.