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  • From: Hamptongar@aol.com
  • To: gwl-g@lists.ibiblio.org
  • Subject: Re: [gwl-g] Jap Beetle Defense
  • Date: Mon, 24 Jan 2005 17:50:15 EST

Over the last three to four years JB's have become less and less of an issue for us in the three locations we garden.  I suspect that one reason is that we pay particular attention to controlling the beetle larvae in the turf and try to make sure we don't grow roses on lawn edges.  JB's take advantage of the ability to lay eggs in the turf where the grubs develop and feed on the grass roots then emerge to feed as adults on any roses that are nearby.  It's a viscous cycle that takes time to break and brake.  When we do see the beetles during the season we use only spot treatments of Pyrethrum with PPB.  This is best done in late afternoon as the sunlight degrades this botanical insecticide very quickly.  If you aren't squeamish about chemicals Merit will give you good grub control when applied at the right time...but it will not show up as JB control until the following season since there won't be any grubs to mature into adults.  Merit should be applied to turf areas and you can probably get away with applications two years in a row then skip a year...or more.
 

Andrew Messinger
The Hampton Gardener
The Hampton Gardener is a Registered Trade Mark
(Published every Thursday in the Southampton Press)







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