Effect of Curly Top-Infective Beet Leafhoppers on Cantaloup Plants

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Abstract
Beet leafhoppers, Circulifer tenellus, were caged on cantaloup plants of the var. Powdery Mildew Resistant No. 45. Plants infested at the cotyledon stage were drastically stunted or killed, while plants infested at the 2-leaf stage of growth were retarded to a less extent, with none killed. In expts. on the feeding of 1 infective leafhopper for 24 hrs. on plants in the cotyledon stage, some of the plants were severaly stunted, whereas others did not appear to be infected. It appears that plants of this var. develop some resistance to the curly top virus between the cotyledon and 2 leaf stages. No symptoms characteristic of curly top developed in any of the expts.

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