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Jerre from Boiling Springs writes

Can Adonis 2F Inscticide/Termiticde be used as a soil drench to combat black vine weevils in rhododendrons?

Will the same drench be effective on wooly adelgids on hemlock?


Yes Adonis 2F Insecticide/Termiticide is labeled to be used as a soil drench for vine weevils. You would use 0.1 to 0.2 fl oz (3 to 6ml) per foot of shrub height per the product label. Apply uniformly as a drench around the base of the shrub. THe minimum amount of water that should be used is 1 pint per foot od shrub height (or inch of trunk diameter for trees) but you may use 1 quart - 1gallon of water per foot of height or inch of trunk diameterfor trees) as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested.  Since sandy soils can accept more water, using the higher volume of water is preferred. After the soil drench has been applied you should water it in with at east 1/2 inch of water. Note: Water simply acts as a carrier and it is important that even distribution of the product is achieved. Thus, more water may be used if the applicator feels runoff will not occur and proper penetration of the root zone is achieved. Insecticides applied to the soil are taken up by the roots and translocated throughout the tree or shrub. Root/soil drenches offer the advantage of requiring no special equipment to apply (other than a bucket or watering can). However, surface layers of organic matter, such as mulch or leaf litter, can bind the insecticide and reduce uptake. Before applying drenches, it is important to remove or pull back any mulch or dead leaves so the insecticide solution is poured directly on the mineral soil. It is also important to keep the soil around the tree or shrub moist for the next 7-10 days after applications to encourage uptake.

Answer last updated on: 04/26/2017

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