Grubbs - Knowledgebase Question

Myerstown, Pe
Question by christinetec
March 30, 2010
What is the best way, and best products, to eliminate Japanese beetle grubs and are ruining my lawn?
Thank you,

Answer from NGA
March 30, 2010


Grub Ex is time release so you can apply in late spring (late May in your region). Grubs feed near the soil surface from August through October but go deep into the soil the other months of the year so they are not readily affected by the chemicals, with the exception of a time release product such as Grub Ex. Before applying, scout for grubs by peeling back the grass or by setting a coffee can with both ends open into the soil in your lawn and filling it with water. Grubs will float to the surface. You can scout now and again in July and August. Ten or more per square foot are necessary to justify treatment. Other products on the market include Bayer Advanced Season-Long Grub Control granules, milky spore, a wettable powdered form of a microbe known as 'Bacillus thuringiensis' or "BT". It is sold under the brand names 'Doom', 'Japidemic' and 'Grub attack. Another organic control for grubworms is using beneficial nematodes. The nematode-powder (such as Bioquest) is mixed with water it is then sprayed on to the affected area. It is important to water immediately after application. Best results are still during the mid-summer months as this is when the grub populations are at their highest. Hope this information helps you get a handle on those pesky grubs!

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