HOST PLANT PREFERENCE OF THE SOYBEAN POD BORER, GRAPHOLITHA GLICINIVORELLA MATSUMURA (LEP., EUCOSMIDAE): 1. Oviposition site
1960
NISHIJIMA, YUTAKA
The host plant preference of the soybean pod borer, an important factor in the resistance of the soybean plant, was studied in the field, using four varieties, two hairy and two glabrous. It was found that there was a considerable difference in the number of eggs laid on the hairy and glabrous varieties, and also in the place where eggs were laid. These differences were observed when the hairy varieties were planted alternately with the glabrous ones. However, the difference in the number of eggs laid was not found when all pods of the soybean plants were removed. This treatment of the hairy varieties caused a great decrease in the number of eggs laid, while on the glabrous varieties this was not the case. These observations suggest that two factors operate (a) varietal preference (b) site preference within plants, e.g. the hairy pod is the most attractive oviposition site.
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