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into the forming nuts inside the burrs. The remaining 20 percent do not emerge until the following August.
Control measures must be aimed at the adult weevils before their eggs are laid.
They need to be stopped by the insecticide as the hole is being made into the burr for egg laying.
The insecticide will not be effective after the egg has been deposited in the nut surrounded by the prickly shell of the burr.
Carbaryl (Sevin) 80 percents is registered for chestnut weevil control at the rate of three tablespoons per gallon of water.
Four applications at weekly intervals beginning about 45 days before the first nuts fall (around August 1 in Northern Virginia) and end spraying at shuck split.
Another practice to help reduce infestation is consistent clean up under the tree of infested nuts during the harvest time.
The strong pungent odor of blooming Chinese chestnut blossoms is over for 1986.
Unless interrupted, the chestnut weevils will be on schedule for their next move to beat the grower to the goodies.
96.2%