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Survey was conducted on the damage of Bradysia agrestis in greenhouse of herbaceous flowering plants and control effects were compared among 4 insecticides and a entomopathogenic nematode. The population density of B. agrestis larvae ranged 0.0~2.4/㎤ in the herbaceous flowering plants. The damage ra...

Survey was conducted on the damage of Bradysia agrestis in greenhouse of herbaceous flowering plants and control effects were compared among 4 insecticides and a entomopathogenic nematode. The population density of B. agrestis larvae ranged 0.0~2.4/㎤ in the herbaceous flowering plants. The damage rate was highest in dianthus (44.6%) followed by flowering tomato (27.4%), primula (26.6%), and petunia (25.2%) among the 22 plants surveyed. In lily, oriental hybrid varieties showed various damage rates from 0% in ‘Ascari’ to 51.4% in ‘Tiber’, and asiatic hybrid varieties also showed different damages rates from 0% in ‘Adelina’ to 65.7% in ‘Chopin’, The insectcides of acephate, furathiocarb and imidacloprid showed control effects of 91.7%, 96.8% and 98.5%, on B. agrestis larva, respectively, in cyclamen at 7 days after treatment. The entomopathogenic nematode, Steinernema carpocapsae Pocheon strain showed control effect of 80.5% at 7 days after treatment and the control efficacy persisted for 14 days after treatments. Growth of cyclamen was not affected by neither the insecticides nor the entomopathogenic nematode.

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