What is in this article?:
• Farmers in the Southeast knew going into the 2011 spring planting season that Temik was being taken off the market — gradually up to 2016.
• They didn’t count on a lawsuit in West Virginia stopping production and significantly restricting the amount of Temik available for the 2011 cropping season.
• The fallout from shortages in Temik supply has already been significant in determining what crops farmers do and don’t plant.
Thimet labeled for cotton
Thimet 20 G, a granular insecticide is labeled for cotton. It is a granular, in-furrow insecticide and can be used similar to Temik for thrips control. A low rate (3.3 pounds per acre) is probably best for cotton planted after May 20. Most growers are past the optimum time for using the higher rate of 8.2 pounds per acre.
“With Temik and seed treatments dominating the market for the past decade or more Thimet and other phorate-containing insecticides have not been evaluated in North Carolina recently. If a producer elects to use one of these materials, we recommend trying it on limited acreage in 2011,” Bachelor says.
Bachelor says in past testing of this product, Thimet sometimes showed less residual control of thrips than Temik. This product may cause phytotoxicity, particularly under cool wet conditions and should not be used following diuron-containing herbicides such as Karmex and Direx.
Unlike Temik which has residual activity on both nematodes and thrips, Thimet does not control nematodes.
An in-furrow at-planting spray of one pound of active ingredient of acephate (Orthene and other generic brand names) also provides some control of thrips, although its effectiveness against high thrips levels may be marginal.
Although foliar sprays with materials such as acephate are taken up by cotton seedlings, even multiple applications often result in poor thrips control.
Peanuts are typically grown on lighter, sandier soils in the Southeast, which provides an ideal environment for root knot nematodes. These microscopic pests cause economic losses by damaging the developing root system, by forming galls on the pegs and weakening them at harvest, and by causing significant deformation of the pods.
Two alternatives are available to peanut growers with high levels of root knot nematodes. Neither has had extensive field testing, primarily because of the efficacy and relatively low cost of Temik.
NemOut is a biological product that produces spores of a fungus that parasitizes eggs of root knot nematodes. Limited testing in Georgia and Florida indicate .3 pound per acre applied in furrow at planting and another .3 pound per acre at pegging show some reduction in nematode populations and damage to peanuts.
Growers who try NemOut in 2011 should take care to ensure that the living spores in the product are kept alive and that living colonies are present at rates between 0.3 and 0.6 pound per acre for use both in-furrow and at pegging time.