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Old 10-18-2016, 10:01 AM   #1
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Best time of year to put Grub/insect killer on lawn?


late spring or can i do it now? fyi i live in midwest great lakes region.
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Old 10-18-2016, 10:19 AM   #2
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Re: Best time of year to put Grub/insect killer on lawn?


I think they have Fall variants of grub control as well.
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Old 10-18-2016, 10:20 AM   #3
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Re: Best time of year to put Grub/insect killer on lawn?


June or July are best. If you have them now, I would certainly not wait till then to apply.
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Old 10-27-2016, 06:28 PM   #4
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Re: Best time of year to put Grub/insect killer on lawn?


Regular grub killer is absorbed by the grass and the grubs are killed when they start to eat those grass roots. The mid June to mid July application gives lead time for the grub killer to get into the grass and the grubs have just hatched and are small and killed more easily.

Now (late October) the grubs have gotten at least medium sized and also have slowed down their feeding and will soon hibernate. Also the grass has slowed growth so it would take longer to absorb grub killer for the grubs to eat. So many experts say to wait until spring.

Come spring the instant kill on contact(24 hour) grub killer is recommended. The grass has to get up to speed growing to absorb regular grub killer for the grubs to eat. Also the grubs are big enough that it would take 4 times the amount per square foot of regular grub killer compared with a July application.

You could try the instant kill grub killer now, but you may need more since the grubs are resting further down in the ground given current colder temperatures.
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Stick to your lawn watering schedule until it really starts to pour. After the storm you have only the same number of rest days you always had and then you need to start watering again.

Last edited by AllanJ; 10-27-2016 at 06:49 PM.
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