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[棉花病虫害防治] 棉铃红粉病如何防治?_中国农业网_农林网_种植...

一、棉铃红粉病症状及危害 棉铃红粉病是棉花铃期的一种常见病害,发病率0.16%～8.75%。各棉区都有发生,南部棉区较多,北部棉区在秋季多雨年份发生。 棉铃受害,表面布满粉红色的绒状物,厚而紧密,空气潮湿时,绒状物变成白色,使棉铃不能开裂,纤维变褐粘结成僵瓣,棉瓤干缩。 二、棉铃红粉病传播途径和发病原因 棉铃...
nonglinzhongzhi.com/a/8/2017/0507/33... 2023-6-17

[水稻病虫害防治] 稻瘿蚊用什么药防治?_中国农业网_农林网_种植...

治水稻稻瘿蚊用什么农药?水稻稻瘿蚊用什么方法防治?以下耕种帮就作简单介绍,供网友们参考。 一、稻瘿蚊对水稻的危害 水稻受稻瘿蚊危害后,俗称为标葱、稻出葱等。 稻瘿蚊以初孵幼虫先从水稻叶鞘间隙或叶舌边缘侵入,然后再慢慢沿叶鞘内壁向下为害水稻生长点,吸取其汁液。水稻生长点遭破坏,心叶停止生长,幼茎也随之...
nonglinzhongzhi.com/a/8/2017/0507/34... 2023-6-18