NGHIÊN CỨU QUY LUẬT PHÁT SINH PHÁT TRIỂN CỦA RẦY CHỔNG CÁNH DIAPHORINA CITRI KUWAYAMA TRONG NĂM

We have checked 30 farmer citrus orchards and determined area which psyllids population was high and then we established experiment in Tien Giang, Ben Tre and Vinh Long province to check psyllids population in year. Results showed that psyllids population dynamic depends on area but assume was low on Nov and Dec. Beside that, experiment psyllids movement, psyllids could move at altitude from 0.1m to 3.2m and psyllids settled serveral population at 1.3m high by using yellow sticky trap to set up at several different altitudes.