How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Viruses

Most viruses attacking cucurbits have a wide host range, which includes carrot, lettuce, tomato, beans, peppers, and several weed species. Transmission to cucurbits from other host plants requires contact with plant sap. The most common means of spread is through feeding by insects that have fed on the sap of infected plants. Usually only one or a few species of insects transmit a specific virus. Many species of aphids transmit potyviruses and cucumber mosaic virus. Cucumber aphidborne yellows is transmitted by the cotton aphid and the green peach aphid. The spotted cucumber beetle and other related beetles vector squash mosaic virus, and the silverleaf whitefly transmits lettuce infectious yellows.

Potyvirus on squash
Potyvirus on squash

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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