When whitefly, greenfly, blackfly, thrips, midges and other flying insects are about, be sure the greenhouse whitefly traps are in place. Seven yellow sticky traps with twist ties to give pesticide free, non-toxic, organic control. Whitefly traps are recommended for identifying the presence of whitely before introducing Encarsia, the parasitic wasp, for biological pest control. (see Pest Control GF3002)
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