Harmful characteristics:
Wood moths are: aromatic wood moth Oriental subspecies, small line angle wood moth and coffee wood moth, etc., the larvae are grayish-white or crimson, almost glabrous, drilling into the tree stems, when serious, it can cause the whole branch, the whole tree withered, seriously affecting the growth of the yellow bark tree.
Occurrence pattern:
Beijing 2 years 1 generation, to larvae in the infested trees in the xylem and soil over winter. Overwintering in the soil of the mature larvae in April and May of the following year, pupation, May and June adult feathering out, have a tendency to light, more eggs and bark cracks, inter-root, etc., each female average egg production of about 245 eggs, eggs into blocks, each block of more than 10 head of groups of moths into the bark to feed on the xylem from the cracks discharged in the xylem, began in late October in the xylem of the winter, continue to damage in the following year to the end of the year 9 years began to mature larvae crawl out of the tunnels, to Trees near the root system, clumps of weeds at the ridge, soil slopes and other sunny and dry soil cocoon for the winter.
Methods of prevention and control:
1, often check the orchard, found that the insect or aspen and other wood-boring moth pests can be manually cut off the insect branches burned. If the damage is the main trunk or larger branches are inconvenient to cut, the wire can be used to kill the larvae and pupae in the insect tract.
2, in the fresh feces in the cavity inserted into the 80% dichlorvos emulsion 100 times dipped in the drug swabs or directly with a syringe to the cavity injection of the liquid, outside the mucus sealing hole.