Question:

I have leafhoppers starting in peanuts. Heavy on edges of field. Very light in field. Occasional small corn earworms. The next leaf spot spray is late next week. Will peanuts be hurt by leafhoppers if I wait for that spray.

Jordan:

A pyrethroid should be effective and inexpensive. I discussed this with Dominic earlier today. If the leaf hoppers are active, you could continue to pick up some burn. I saw a big change over a three-week window at one location (almost no burn to enough burn you might panic.) In retrospect, treating 7-10 days earlier would have helped in that field. We say 30 to 40% burn is the threshold. If you scout and there are no active leaf hoppers, there is no need to spray. But if active, I would not wait a week. If you are wet and can’t get in now, I’d move my leaf spot spray up and add the pyrethroid when you can get in the field. But make sure they are active. Lots of variation when it comes to leaf hoppers.

Follow Up:

I’m sweeping. Occasionally have 1-3 hoppers in the net. Mostly 0.

Also. Just figured out it’s showing up on the ends where planter started and imidacloprid wasn’t flowing yet. 3 to 5 steps into same set of rows there is no damage.