Study on the Morphology and Biology of Euagoras plagiatus
The morphological and biological characteristics of Euagoras plagiatus were studied through the indoor rea-ring,which provided basic data for the study of using this natural enemy to control insect pests.Under the artificial environment of temperature being(26±1)℃,light being 16L:8D and relative humidity being(65±5)％,Tenebrio molitor was used to feed E.plagiatus.The biological characteristics of E.plagiatus,such as the morphological char-acteristics of eggs,nymphs and adults,the developmental duration,predation,and fecundity were observed and re-corded,and the generation duration and effective accumulated temperature were analyzed.The results showed that:under the laboratory conditions,the egg stage of E.plagiatus was(8.50±0.74)days,and there were five instars in the nymph stage.The pre-oviposition period of the adult was(14.80±3.71)days.The average number of eggs laid per female was 216.80±106.04,and the average life span of adults was(147.35±72.36)days.The average dura-tion of one generation under the laboratory conditions was 81.38 days,and the effective accumulated temperature was 2115.88 days·degree.E.plagialus could prey on Spodoptera frugiperda,Argyrogramma agnata,Spodoptera li-tura,Brachmia macroscopa,Plutella xylostella,Pieris rapae,Cryptolestes turcicus,and Culex quinquefasciatus.The study showed that E.plagiatus occurred four generations a year in the laboratory environment and could prey on a variety of pests,which could provide an important reference for the further protection and utilization of this natural enemy.
万方数据
维普
