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KMID : 0613820010110020121
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Journal of Life Science
2001 Volume.11 No. 2 p.121 ~ p.125
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Differences in Nymphal Development, Adult Longevity and Fecundity of the Green Rice Leafhopper, Nepthotettix cincticeps Uhler Fed on Rice Cultivar and Water Foxtail, Alopecurus aequalis Sobol. Var. amurensis Ohwi at Various Temperatures
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Choi Joo-Soo
Park Young-Do
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Abstract
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Some attempts were made to investigate the biological characterisitcs of the green rice leafhopper(GLH) , Nepthotettix cincticeps Uhler in terms of nymphal development, emergence ratio. preovipositional period, growth index, adult longevity and fecundity fed on rice cultivar, Chucheongbyeo with no resistance gene and water foxtail, Alpecurus aequalis Sobol. var. amurensis Ohwi at 20 and 25^{circ}C with a 16L;8D photoperiod. Development period of nymph on rice cultivar and water foxtail at 25^{circ}C was shorter than that at 20^{circ}C by twofold. The nymphal period of female was about one day longer than that of male. The mean emergence ratio of female and male on rice cultivar and water foxtail was 40.0, 76.7, 38.3, 73.3% at 20 and 25^{circ}C, respectively. Preovipositional period on rice cultivar and water foxtail at 25^{circ}C was shorter that at 20^{circ}C by twofold. Growth index on rice cultivar adn water foxtail at 25^{circ}Cwas higher than that at 20^{circ}C by fourfold. Under the 20 and 25^{circ}C condition, the longevity of female and male was longer on water foxtail than on rice cultivar, but the fecundity of GLH was higher on rice cultivar than on water foxtail. In conculsion, water foxtail seems to be adequate for spring host of GLH.
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KEYWORD
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Nepthotettix cincticeps, water foxtail, nympal development, emergence ratio, growth index, preovipositional period, fecundity
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