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Merit Insecticide Question
I can't tell you the science behind it, but do know that that is how it
works. You are not permitted to reapply because it has such a long residual. When I used to spray Dursban and Diazinon and had spraymix left over the next day I would just count it as water. The 1/2 life on that stuff is very short, depending upon water ph, sunlight exposure etc. Merit is different. It hangs in there. Peter H "Peter" wrote in message ... Fasinating. How does it prevent the new grubs from feeding? Why is it prohibited to reapply Merit twice in one year? What is the harm in it? Thanks Peter Merit has a very long residual. It hangs around for about 3 months. This is why they don't permit a second application in a season here. You may as well just double the application rate initially 'cause the first application is still there. Merit works to prevent the new, young grubs from feeding. They ingest it in very small quantities and then can't feed again which causes them to starve to death. I have found it to be virtually 100% effective even when the application is not perfect. Unfortunately the adult grubs are just too big and strong to be effected. Fortunately they will pupate into June Bugs and fly off and bother someone else in the next spring, or following one. Merit should eliminate your grub problem, but you have to be patient. You are right when you say now is the right time to apply it. Peter H "Peter" wrote in message ... Thanks Peter - But why won't it do anything for existing grubs? I read that it kills grubs. Also, the new infestation is under way, the beetle population peaked last week and the eggs shouls start hatching grubs any day now. What I understand, now is the best time to apply Merit. I also understand Merit is not harmful to people and pets, so overapplication doesn't have any *real* adverse effects. Thanks Peter "Peter H" wrote in message .cable.rogers.com... "Steveo" wrote in message ... No, it won't hurt anything but your wallet. "Peter" wrote: Thanks for you reply Steveo. Will it hurt my lawn to reapply? I *really* need to wack the grubs bad. They got me the last two years before I realized what was going on. I want the mothers dead. Peter " Peter wrote: I spread a 14 pound bag of Bayer Merit granulated on my yard last night, and watered the lawn afterward with between 0.25 and 0.5 inches of water to wash it in. I'm attempting to kill Japanese beetle grubs - have had a bad problem for the last tow years. I applied the Merit at a heavier rate than recommended. The recommended rate is 2.8 lbs/1000, I used 3.8 lbs/1000. My soil is clay and perculates a little slow. Tonight we had a heavy thunderstorm and heavy rain. We got about 1 inch of rain in about 15 minutes. My question is; did all of my Merit wash away? Should I reapply? Thanks Peter It doesn't matter. The grubs have become Japanese beetles and are flying around now. Reapply before July 4 next year. Heh, what do you think those beetles are doing when they're not feeding?... That's right, laying eggs for the next generation. The Merit will protect Peter's lawn from grub damage this fall and consequently next spring too. I really doubt it has washed away, Peter. It clings to organic material real well. Here in Ontario you are not permitted to reapply. Merit has a very long residual... and you have already admitted to applying above the recommended application rate. You should leave it alone. Keep in mind that the application will not do anything about the existing grubs in your lawn. Merit will only prevent a new infestation. I have applied it many times and have seen it watered in, not watered in and drenched. It has still been effective in preventing a new infestation every time. Peter H |
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