Studies On The Biological Characters Of Quarantine Insect Opogona Sacchari And Its Integrated Management

Opogona saccharin (Bojer)is a kind of invasive insect recently found harming garden plants, such as Dracaena fragrans, Dieffenbochia daguensis, and field crops, such as sugarcane, banana and potato. Based on the investigation of the damages caused by Opogona saccharins and the scope of their hosts, this research studied the biological and ecological characteristics of Opogona saccharin further, and proposed an integrated management focusing on fumigating prevention and control.By now, there are 37 species of Opogona saccharin flower hosts in 12 families found in Shandong Province. Among them, 11 species belong to Palmaceae family, 8 to Agavaceae family and 6 to Araceae family. Dracaena fragrans belonging to the Agavaceae family and Dieffenbochia daguensis belonging to the Bombacaceae family are the two most severely and broadly damaged ones. Cordyline fruticosa, Yucca elephantipes, Nolina recurvata, Euphorbia pulcherrima, Pelargonium hortonum, Cayloto ochlandra Hance, Chrysalidocarpus lutescens and other flowers are also harmed in some degree. There is no harm found among field crops. According to an investigation made by Shandong Plant Protection Bureau, Opogona saccharin distribute in 10 cities of Shandong Province and 12 counties of Jining City.Food habits of Opogona saccharin are very complex, among them, boring, corrosiveness and omnivorosness. Food habits and damage symptoms differ on different host plants.Opogona saccharin have 3~4 generations per year in Jining City. They live through the winter in the form of larva in the pot earth of the potted flowers in greenhouses. Under the natural conditions in Jining city, according to an investigation undertaken on March the 20, mortality of Opogona sacchari (Bojer) in the open air living through the winter hiding 1 cm, 5 cm, 10 cm and 20 cm beneath the earth are 100%. Larva living through winter indoor can not live through winter under natural conditions.