问题是现在草坪长得不好，绿是绿，但有些稀疏。主要原因是请 WeedMan 来施除草剂，左等不来，右等也不来，把时间给耽搁到五月底，才施上。又登了两个星期，除草剂发挥效果后，才补了些土，撒上草籽。但是草籽已经活不过来了。浇水全养了没怀死的草坪部分，所以看上去还绿一些。
在这种情况下，grub 的问题是不是就很严重了？去年是看到了很多蛐蛐飞来飞去。想象今年地下的虫蛹应该不少。可是介绍上都说要等到八、九月份再施杀虫剂。还来得及吗？现在要是施杀虫剂的话，是不是也得浇透水，让杀虫剂渗到地下才成？要是那样，如果药量不够杀不死虫蛹，不是反而养肥了虫子吗？
引用:
最初由 Timothy's 发布
The cheapest and simplest way is "do nothing". Even you kill them this year, the adult bugs can fly, they will lay eggs in your lawn next year. If your lawn is in good condition it can take it. Don't water July and August also helps because adult bugs look for moist soil to lay eggs.No eggs, no grubs. I found them in my lawn too, two pieces grass are dead. I replaced them this spring. After few good rains and fertilizer the smaller gap was closed by grass itself. They are grubs killer at store, you can use them in August if you really want to.
http://www.landscapeontario.com/howto/how-to39.pdf
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