四川高粱穗部害虫群落组成及分布

已查明四川高梁穗部害虫有54种。其中,粟穗螟(Mampavabipunctella Ragonot)、桃柱野螟(Dichocrocis punctiferalis Guence)为主要虫种。高粱花翅小卷蛾(Lobesia aeolopa Meyriek)、柑桔长卷蛾(HomonaCoffearia Meyrick)为次要虫种。棉铃实夜蛾(Heliothis armigeva Hubner)为局部偶发成灾种类。其余49种属于少量或零星发生种类。害虫种类以盆南高温区域最多,随纬度北移和海拔上升而减少。根据穗虫群落构成和发生动态,可将四川省高粱穗部害虫群落分为粟穗螟为主区和桃蛀野螟为主区。

COMMUNITY COMPOSITION AND DISTRIBUTION OF INSECT PESTS ON SORGHUM PANICLES IN SICHUAN

Flftteen insect pest species,including 28 new records,that attack sorghum panicles in Sichuan have been established.Foxtail millet webworm(Mampava bipunctella Ragonot)and peach borer(Dichocrocis punctiferalis Guenee)are the dominant pest specis,Lobesia aeolopa Meyrick and tea tortrix(Momona aoffearia Meyrick)are of secondary importance, and cotton bollworm(Heliothis armigeva Hubner)causes only accidental calamity in partial areas.The occurrence of the other 49 species is fragmentary.In the present study,the great- est number of sorghum panicle pest species was found in the high-temperature areas in the south part of the Basin,and the species number decreased-with the latitude moving north- ward and the elevation moving upward.Base on their community composition and occur- fence dynamics,the pest communities attacking sorghum panicles are divided into two groups:a foxtail millet webworm-dominatede area and a peach borerdominated area.