孝感稻田地区玉米螟发生与防治的研究

作者在孝感市以水稻为主的稻棉混作地区，对稻田轮作玉米的玉米螟发生与防治进行了研究。结果表明：孝感稻田地区玉米螟一年发生4代，第三代为多发代，各代成虫盛发期分别为5月中旬（越冬代）、7月上中旬（第一代）、8月上中旬（第二代）、9月上中旬（第三代），世代重叠明显。玉米不同播种期与玉米螟为害的关系密切。在心叶期进行防治，以4.5%高效氯氰菊酯EC450mL/hm^2防效最好，其次是5％锐劲特悬浮剂150mL/hm^2和50％甲胺磷EC450mL/hm^2，校正防效均达90％以上。

Study on the Generation and Control of Ostrinia nubilalis (Hubner) in Xiaogan Paddy-field District

In this paper,the author studies the generation and control of Ostrinia nubilalis (Hubner) in paddy-fields of Xiaogan district.The results are as follows: Ostrinia nubilalis (Hubner) has 4 generations each year and the third generation occurs frequently.The peak period of each generation is middle ten-day period of May(overwinter generation),first and middle ten-day period of July(the first generaiton),first and middle ten-day period of August(the second generation),first and middle ten-day period of September(the third generation).The phenomenon of generation overlapping is obvious.There is close relation between different sowing time and the damage of Ostrinia nubilalis (Hubner).In heart-leaf period,the best elimination effect is 4.5% beta-cypermethrin 450mL/hm 2,the next is 5% Regent 150mL/hm 2 and 50% methamidophos 450mL/hm 2.The corrective elimination effects are all over 90%.