浙南山区单季晚稻福寿螺预测预报技术及防治指标研究

Study on the forecast technology and control index of Pomacea canaliculata in single cropping late rice in southern Zhejiang mountain area

2007-2011在浙江省遂昌县开展了单季稻稻田福寿螺调查监测,研究了单季稻稻田福寿螺预测预报技术和防治指标。结果表明:预测浙南山区单季稻稻田福寿螺发生程度关键是越冬后福寿螺田间基数,建立了预测模型Y=0.2045+0.4447X,吻合率92.9%。手插移栽单季稻产量损失率(Y_1)与越冬后福寿螺田间基数(X_1)的关系模型为Y_1=1.4661+0.4169X_1,直播单季稻产量损失率(Y_2)与越冬后福寿螺田间基数(X_4)的关系模型为Y_2=3.7914X_4-1.6613。在现有生产条件下,经济允许水平(EIL)为2.1%-2.8%。制定了手插单季稻福寿螺防治指标为1.5-3.2头/m^2,直播单季稻防治指标为1.0-1.2头/m^2。

Investigation and monitoring of Pomacea canaliculata in single cropping late rice were carried out at Suichang County,Zhejiang,2007 to 2011 ,and the forecast technology and control index of Pomacea canaliculata were studied.The results showed that the key of forecasting the threat of Pomacea canaliculata in single cropping late rice in southern Zhejiang mountain area is the field cardinal number of overwintering Pomacea canaliculata .The forecast model was set up as Y =0.2045 ＋0.4447X ,with coincidence rate 92.9%.The relation of the loss rate of hand planting single cropping rice（Y 1 ）and the field cardinal number of overwintering Pomacea canaliculata （X 1 ）was Y 1 = 1.4661 ＋0.4169X 1 ,and the relation of the loss rate of direct-seed single cropping rice （Y 2 ）and the field cardinal number of overwintering Pomacea canaliculata （X 4 ）was Y 2 =3.7914X 4 - 1 .6613,and the economic injury level（EIL ）was 2.1 % -2.8%.The control index of Pomacea canaliculata in hand planting single cropping rice was 1 .5 -3.2/m2 ,and the control index of Pomacea canaliculata in direct-seed single cropping rice was 1 .0-1 .2/m2 .