Some Environmental Factors Influencing Oviposition by the Potato Leafhopper, Empoasca fabae1

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Abstract
The oviposition of the potato leafhopper, Empoasca fabae (Harris), was shown to be influenced by temperature, photoperiod, and time of day. Maximum oviposition was obtained at a constant temperature of 75° F. A long photoperiod enhanced oviposition, although ovipositional activity was at a maximum during the dark hours, particularly during the period 2000 to 0000 hours. Of 4 leguminous host plants tested in the greenhouse, E. fabae preferred broad bean for oviposition, followed by alfalfa, soybean, and pea in descending order of preference. Young succulent alfalfa tissue was preferred over older lignified portions.

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