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我省常年种植水稻3200万亩左右,占粮食种植面积34.9%,产量占粮食总产47.7%以上.稻区耕作制度复杂,加上施肥水平提高和品种更换等原因,致使白叶枯病、稻瘟病、褐稻虱、稻纵卷叶螟、三化螟等多种病虫害频繁发生.仅在七十年代,白叶枯病中度以上流行就有五次,褐稻虱中等以上发生有六次.八十年代以来,因生态环境的改变,稻纹枯病、白背飞虱、二化螟又急剧上升,稻曲病、害螨等一些新的病虫害也有发展.因此,如何搞好水稻病虫综合防治,已成为稻区迫切需要解决的一个问题.
Rice planting area is 34.9% of the total, and its output accounts for 47.7% of the total grain output. The complexity of tillage system in rice area, together with the improvement of fertilization level and variety change, led to the development of bacterial blight, rice Many diseases and pests such as blast, brown planthopper, rice leaf roller, and striped stem borer occur frequently. Only in the seventies, bacterial blight was more than five times moderate, and brown planthopper occurred more than six times Since the 1980s, due to the change of ecological environment, rice sheath blight, whitebacked planthopper, and stem borer have risen sharply, and some new diseases and pests such as smut and pest mites have also developed.Therefore, how to improve rice disease Insect integrated control has become an urgent need to address the issue of rice.