Invasive Species Compendium

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Abstract

Comparative incidence of stalk borer, Chilo auricilius Ddgn. in autumn and spring planted and ratoon crops of sugarcane.

Abstract

The incidence of Chilo auricilius Dudgn. was studied in autumn-planted, spring-planted and ratoon crops of sugar-cane in Haryana, India, in relation to climatic conditions, in order to determine their relative susceptibility to attack by the pest. The incidence of C. auricilius at harvest was greater in the autumn-planted crop (95.2-96.7%) than in the spring-planted one (87.0-96.5%), while the ratoon crop had the minimum incidence (54.6-94.4%). The intensity of attck, on the basis of internodes, was 32.8-34.4% in the autumn-planted crop, 28.2-31,8% in the spring-planted crop and 21.4-29.9% in the ratoon crop. Rainfall appeared to be the major environmental factor affecting the incidence of the pest during the period of crop growth. There was no significant difference between pest incidence in July and at harvest in any of the crops.