Aphids in unexpected places

Although the walls of a greenhouse will protect your crops to a multitude of insects, aphids tend to pop up in unexpected places.

Recognizing the aphid species present can be important for determining the correct biocontrols to use, to help understand why biocontrols released aren’t working well, and to detect the presence of a potentially damaging pest new to the area. At least one insecticide (Sarisa) is labeled only for one particular species (melon aphid). Some aphids can be less susceptible to certain insecticides or have a reputation for tolerance, which some learned the hard way after finding treated calibrachoa hanging baskets with unexpected infestions.

The most common aphid species in greenhouses include green peach (Myzus persicae), melon (Aphis gossypii), foxglove (Aulacorthum solani) and potato aphids (Macrosiphum euphorbiae) and it’s not too hard to distinguish these.

Read the complete article at www.e-gro.org.

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