越冬代尖钩宽黾蝽耐饥力的研究

Hunger tolerance of Microvelia horvathi hibernating generation.

研究了越冬代尖钩宽黾蝽成虫的耐饥力大小 .结果表明 ,在 14～ 3 2℃范围内 ,尖钩宽黾蝽不同翅型雌、雄成虫的耐饥力随温度升高而下降 ,各温度间差异显著 .14℃时 ,尖钩宽黾蝽成虫的耐饥时间最长 ,达 3 2 10d(无翅型 )和 2 9 5 8d(有翅型 ) ,3 2℃时 ,则分别为 9 46d和 7 82d ;无翅型成虫耐饥力高于有翅型 ,同一翅型雌成虫的耐饥力又高于雄成虫 ,而且温度越低 ,二者间的差异越大 .不同密度下尖钩宽黾蝽成虫的耐饥力差异显著 ,1雌 1雄 /瓶的耐饥力显著高于 5雌 5雄 /瓶和 10雌 10雄 /瓶 ,而后二者间的差异则不明显 .另外 ,尖钩宽黾蝽 1龄若虫的耐饥力在各温度间的差异也显著 ,14℃和 2 0℃的耐饥力显著高于 2 6℃和 3 2℃ .

The experimental results showed that the hunger tolerance (HT) of different wing forms Microvelia horvathi adults had significant difference at 14～32℃,and decreased with increasing temperature,which was 32\^10 and 29\^58 days at 14℃, and 9.46 and 7.82 days at 32℃, respectively for apterous and pterygote adults.The HT of apterous adults was higher than that of pterygote ones,and females was higher than males with the same wing form.The lower the temperature,the bigger the difference.The HT of M.horvathi adults differed obviously with densities.1 female 1 male per bottle had a higher HT than 5 females 5 males per bottle and 10 females 10 males per bottle,while no difference was found between two latter densities.The HT of the lst instar nymphs of M.horvathi had an obvious difference at different temperatures,which was significantly higher at 14 and 20℃ than at 26 and 32℃.