萧氏松茎象成虫在不同寄主植物上取食、繁殖和生活历期研究

Study on the Feeding, Fecundity and Duration ofHy lobitelus xiaoi Zhang Adult ofD ifferentHosts

摘要: 在25℃恒温、RH 90%的条件下, 对萧氏松茎象成虫在湿地松、火炬松、马尾松、黑松、雪松、杉木、金钱松和罗汉松共8种植物上取食、繁殖及生活历期进行了研究。结果表明: 成虫取食湿地松的量最大, 为83. 9 mm2 头-1d-1, 其次是马尾松、黑松和火炬松; 取食金钱松和罗汉松的量最小。成虫取食湿地松的产卵期最长, 为57. 4 天; 产卵量最大, 平均为14. 3粒, 取食马尾松、黑松和火炬松的次之。取食马尾松、湿地松、火炬松、黑松和雪松产的卵孵化率均在80%以上; 取食杉木的最小, 为50%, 取食金钱松和罗汉松的雌虫不产卵。取食湿地松、火炬松和马尾松的成虫历期较长, 取食杉木、罗汉松和金钱松的历期较短。

Abstract: E ffects o f 8 p lant spec ies on the feeding, fecund ity and durat ion o fH ylobitelus x iao i adu ltsw ere eva luateda t a constant temperature of 25℃ and relat ive hum id ities ( RH ) of 90%. Resu lts show ed that the adults consumed83. 9 mm2 of P inus elliottii tw igs wh ich w as sign ificantly higher than they d id on o ther plant spec ies. Adults la idsign ificantly more eggs and lived sign if icantly longer on P inus elliottii tw igs than on the other p lant spec ies tw igs.Feeding on Cunninghamia lanceola ta、P odocarpus macrophyllus and P seudo larix kaemof eri led to highermortality o fthe adu lts.