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Aphid/Virus



North Central IPM Center

Aphid/Virus


Aphids are pests to pea, lentil, alfalfa and clover. They survive by sucking sap from stems, leaves and pods which in turn deplete the plants resources required to set and fill seeds. Aphids can be easily detected in a field by inspecting plants. A mature pea aphid is small-approximately 1/8+ inch long and range from pale to dark green in color. They move slowly and do not hop.

Scouting for pea aphids
Aphid populations should be assessed during bloom to determine if potential yield loss is greater than the cost of control measures. Aphid populations can be evaluated by counting the number of aphids on the top eight inches of at least 20 plants sampled throughout the field or with a sweep net. If there are more than four aphids per plant or 15 aphids per sweep, a treatment is advised shortly after bloom.

To view the power point of Insect Pest of Peas and Lentils 2010 by Daniel Walstein the following link: Insect Pest of Peas & Lentils 2010


Below is the "Aphid/Virus Tracker" homepage containing information and resources designed to help producers manage pea aphid, Acyrthosiphon pisum, and the viruses it vectors to legume crops in the Palouse region (northern Idaho and adjoining Washington State) of the USA.

"Aphid/Virus" Tracking

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