Effects of Odors from Host and Non-host Plants on the Behavior of Drosicha corpulenta (Kuwana)
To acquire the most suitable plants to control the scale insect Drosicha corpulenta (Kuwana),the behavioral responses of the nymphs (the 2nd-instar) and female adults of D.corpulenta toward the odors released from the twelve species of host plants and six species of the non-host plants were studied by using the "Y-shape" olfactometer, and the effect of the extracts of the four non-host plants on the honeydew excretion of the D.corpulenta was investigated by using the honeydew chromogenic method.The results showed that both the nymphs and female adults displayed obviously taxis responses to the volatile of host plants Diospyros kaki, Ziziphus jujuba and Populus tomentosa.The inducing effect of D.kaki reached the extremely significant difference level and the inducing rate for the nymphs and adults were 68.9 ％ and74.7％,respectively.However, the volatile and alcoholic extracts of the non-host plants, Zanthoxy lumbungeanum , Ailanthus altissma , Mentha haplocalyx and Forsythia suspense displayed remarkable repellency effect on the scale insect.In comparison, the volatile of Amygdalus triloba only exhibited the remarkable repellent effect on the female adults.The alcoholic extracts of Z.bungeanum and A.altissma showed the strongest effect on the nymphs with excretion decrement rate 70.6 ％ and 70.1％ and the female adults with 80.5％ and 72.4％, respectively.D.kaki possessed of the strongest inducing effect,while Z.bungeanum and A.altissma had the strongest repellency effect on the nymphs and female adults.It provides a potential intercropping pattern of Z.bungeanum or/and A.altissma in orchard to achieve biological control of D.corpulenta.
国家科技期刊平台
NSTL
万方数据
维普
