1, select the control period: the grub control in the spring and summer larval hatching larvae effect of ginkgo tree price drug good (young period).
3, the use of appropriate methods of prevention: try medication adequacy, irrigate liquid full contact body.
A. ginkgo tree medication before sparse grass, the removal of litter layer thickness, punch after medication.
B. for dry soil, water can be half a day in advance, let the grubs to ground movement, medication.
C. high temperature selection to the ginkgo tree in the evening medication, when the temperature is low in the noon drug selection.