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Marc from Boca Raton, Fl writes,

What is the mix rate of Criterion for Ficus?

I have a very full 6 foot ficus shrub comprised of about 30 plants. How would I apply the product to treat a thrip infestation. Specifically, how much product in how much water to drench the roots?


For systemic root drench applications of shrubs: 1.6 (1 packet) per 24-48 cumulative feet shrub height. The minimum amount of water that should be used is 1 pint Criterion  per foot of shrub height but you may use 1 quart -1 gallon of water per foot of height 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.

Answer last updated on: 08/25/2011

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