• Bob Whitney, TPB Exec Dir

No 2nd Gen. Casebearer?


Back in April I put our 3 PNC traps in an orchard with about 200 acres of trees. I would have to say that this is one of the strangest years for trapping adult moths, finding eggs or even seeing a nut entry.

That was 1st Generation. On June 1, I put in new PNC lures to be ready for 2nd generation and I did expect to see some adult moths. These 200 acres are surrounded by trees not sprayed ever so moths should be in the area. Based on the May 5-6 trap catches, I expected to start catching moths around 42 days later around June 22. So far, I have not seen a single moth. I will continue to check traps over the next several days but I'm starting to wonder what happened to them this year?

Differential Grasshopper

In looking through orchards my main focus has been to look for PNC nut entry and to look for walnut caterpillar that may be showing up early. Of course I'm looking to see leaves eaten off limbs and while looking I've noticed many trees with scattered leaves partially eaten and the culprit has been grasshoppers. As hay producers have been harvesting hay fields the grasshoppers have been moving to a new source. They don't seem to like pecans but they can get started feeding and won't leave. Typically they work the orchard margins at first but quickly move in.

There are many insecticides that control grasshoppers in pecan orchards but be careful because spider mites can get to be a problem. Technically, none of the generic imidacloprid insecticides have a label for controlling grasshoppers in pecan orchards. But, I have discovered that if you are using imidacloprid for aphid control it seems that it also controls grasshoppers which can save you some money as you control aphids. We saw this after using imidacloprid for black pecan aphid several years ago and large grasshoppers were on the ground hours after spraying.

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