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Trichogramma Release Instructions
Trichogramma wasps arrive still developing inside moth eggs on one inch by one inch square(s), or sheet(s) of squares, that resemble sandpaper. Each square contains roughly 5,000 parasites. Depending on temperature conditions during shipping, adult trichogramma wasps will emerge 1-3 days after arrival. If immediate release is inconvenient, the container(s) can be placed in the refrigerator for up to 3 days. DO NOT FREEZE.
Trichogramma adults are very small (1/50th of an inch), and once emerged can be seen as tiny brown dots moving around in the container. They are best released in the early morning or late afternoon. Simply place the opened container(s) out of direct sunlight in the area where moths are suspected or seen. To control pests in trees, staple or otherwise attach the container to the tree as high as possible. This will also prevent the square(s) from being blown away by the wind. Ants can be a problem, eating the eggs on the square(s) if found -- placing the square(s) in strategic areas should prevent this. Hanging the square(s) on a piece of thread is a solution.
Regular releases during moth activity has proven to be most effective. Once caterpillars are present, other control measures such as Bacillus thuringiensis (Bt-k) may be necessary.
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