Location of parts of rice plants sucked by green rice leafhopper, Nephotettix cincticeps Uhler (Hemiptera: Cicadellidae)
Ogane, Z.; Takita, Y.; Naito, A.
Japanese Journal of Applied Entomology and Zoology 23(1): 11-16
ISSN/ISBN: 0021-4914 DOI: 10.1303/jjaez.23.11
The sites at which Nephotettix cincticeps (Uhl.) feeds on rice plants were studied on potted seedlings in a screen cage and in the field; the results were in good agreement. In the early instars the nymphs fed on the lower parts of the leaf sheaths, in the middle instars they fed on the intermediate parts, and in the late nymphal instars and as adults they fed on leaf blades in the upper parts. Few feeding marks were found on the rachises and primary or secondary branches of the panicles, and there were virtually no feeding marks on the grains themselves. The areas from which the sap had been sucked moved upwards as the plants themselves grew, so that the affected areas were found scattered over all the leaf blades on the stem and were not concentrated in one particular area. As the panicles were seldom attacked, no marked decrease in yield occurred.