Posted 8/3/2008 23:06 (#427880 - in reply to #422965) Subject: Re: Japanese Beetle damge ? effect yield Pics
MI
For the damage - typically most references I have read/heard talk about a 20% defoliation as being the threshold - but that was at 5-6 dollar beans. Jap Beetles are voracious feeders and they also lay little eggs that turn into grubs that can attack crops below ground as well.
With beans about double that - I would think the threshold would be halved......
Japanese Beetle damge ? effect yield Pics
