Jun 06, 2014 - 09:34 AM
A hose end sprayer is not recommended to apply these products for grubs either. While a hose end sprayer is great for some fertilizers, it will dilute the insecticide to the point of it being ineffective. The only way to mix pesticides with any precision is to mix them in a tank sprayer and apply them with a tank sprayer.
Depending on where you live, the "window" of time to apply ANYTHING for grubs is generally 3-4 weeks. Which is usually June - August. To get the exact window, we need to know where you live. You can also contact a local extension office or major university (agricultural or entomology dept) to find out.
Hope this helps.