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News and information from UC Cooperative Extension about alfalfa and forage production.
Tractor & Hay bales
Comments:
by Owen Taylor
on September 1, 2013 at 4:18 PM
So, to what extent is it turning up this year?
by Jerry anderson
on September 6, 2013 at 6:21 PM
In the Dos Palos area the SAA do not seem to be found on the stem but rather on the under side of the leaves. Different from "old SAA". I've had as many as 50 ave lady bug larvae per sweep vs maybe 200+ SAA and I thought we were OK. Two days later the field is turning yellow, stunting and and honeydew is forming. Dimethoate, chlorpyrifos,malathion, lannate only seem to kill the beneficials. Nine of us local PCA's have tried combinations of the above with not much success. Lannate/lock-on seems best choice right now, but we don't know how long it will last. Most all fields have some SAA, but not all "blow up". We had blue alfalfa aphid in the spring and could not kill them. Now we have this spotted aphid along with the cowpea aphid. It's time for some new aphid materials or we're going to be out of the alfalfa business. Thirty-three years I've not had to treat blue or spotted aphid until this year.
 
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