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扬中市地处长江下游,四面环江,多年来以种植单季晚粳稻为主。由于水源充足,氮肥施用量高,水稻长势普遍较好,叶色嫩绿,对纵卷叶虫的取食为害十分适宜。特别是近两年,四代纵卷叶虫发生的峰次多,峰期长,发生量大,部分水稻上部三张功能叶片受害严重,从而导致千粒重下降,降低了稻米的品质。因此,控制纵卷叶虫的为害,就显得尤为重要。为
Yangzhong City is located in the lower reaches of the Yangtze River, surrounded by the river, over the years to grow single-season late japonica rice-based. Due to adequate water supply, high nitrogen application rate, rice growth is generally better, green leaves, feeding on the longitudinal leaf roller harm is very appropriate. In particular, in the past two years, the fourth generation of leafroller occurred in many times with a long peak and a large amount of occurrence. Some three functional leaves of some rice grains were severely damaged, resulting in a decrease in 1000-grain weight and a decrease in the quality of rice. Therefore, the control of the vermilion harm, it is particularly important. for