Abstract
A glasshouse experiment investigated the effects of brown planthopper feeding on the physiology of the main shoot and its indirect effects on the primary tiller with Japonica rice Nipponbare and Indica rice Taichung Native 1. Brown planthopper sucking on the main shoot reduced its height, leaf area, average photosynthetic rate of the two upper leaves, leaf and stem nitrogen content, and shoot dry weight. Nipponbare, had a lower photosynthetic rate, and lower nitrogen content of the leaf and stem of healthy plants, and was affected by BPH feeding more than TN1. With the primary tiller kept intact, the effects of brown planthopper feeding on leaf area and shoot dry weight of the main shoot were less than with the removal of the primary tiller. The results suggest that the primary tiller, not infested by the brown planthopper, translocates nutrients and assimilates into the main shoot, to reduce the effects of brown planthopper feeding on the main shoot.
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