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Jack from Okc, Ok writes

After how long is Hi-Yield Malathion rainfast?

It was applied to black spots on phoetina shrubs.

Answer:

Hi-Yield 55% Malathion Insecticide Spray is considered rainfast after completely drying which sometimes can take up to 4 hours. If it dried all the way you should not have to retreat.

Answer last updated on: 06/19/2017

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