4种杀菌剂在不同播种期下对稻曲病发生程度及产量影响

为了探索稻曲病发生程度与播种期、药剂防治间关系，选出适宜播种期和有效药剂。通过裂区试验方法，于4月26日、5月4日、5月13日分期播种，施用爱苗、井冈霉素、三唑酮、丙环唑防治稻曲病。结果表明：随着播种期推迟，稻曲病发生有加重趋势，产量呈现下降趋势。但以4月26日和5月4日播种，施用爱苗、井冈霉素2种药剂，稻曲病发生程度轻，产量高。其每公顷理论产量分别比不施药处理增产幅度为9.05%~13.23%，每公顷实际产量分别比不施药处理增产幅度为9.95%~13.12%。由此得出，适时早播，有利于控制降低稻曲病的发生。选择爱苗、井冈霉素2种有效药剂防治稻曲病，结合适宜播种期4月26日—5月3日，具有增产效果。

Effects of Four Pesticides on Yield and the Occurrence Degree of the Rice False Smut

In order to explore the relationship of the sowing period, the occurrence degree of rice false smut and control pesiticides, and choose suitable sowing period and effective pesticide, a split plot was designed. Four pesticides, namely Amure, Jingangmyc, ketotriazole and propiconazole were applied to control rice false smut at different sowing time as April 26th, May 4th and May 13th. The results showed that the occurrence of rice false smut increased and the yield of rice decreased with the delay of the sowing period. But the false smut of rice occurrence was more lower and the yield was more higher when sowing time was April 26th and May 4th , and Amure, Jingangmyc were applied to control rice false smut. The theoretical yield per hectare was 9.05% and 13.23% higher than that without using pesticide respectively. The actual yield per hectare was 9.95% and 13.12% higher than that without using pesticide. The conclusion: early sowing can reduce and control the occurrence of rice false smut. Amure and Jingangmyc that applied to control rice false smut at sowing period April 26th-May 4th can increase the yield.