Cotton cotton stalk

The scientific name Zeuzera coffeae Nietner Lepidoptera, Leopard Acrididae. Alias ​​coffee moose moth, coffee leopard moth, leopard moth moth, coffee black moth moth. Distribution in eastern and southern China, in Shanghai, Taiwan, mainly cotton and trees.

Host cotton, tea, mulberry, jute, ramie, coffee, litchi, longan, citrus, pear, persimmon, batch, peach, grape, date and so on.

The larvae eat the stalks of cotton and jute to make them dead or dead; damage to mulberry, tea and fruit trees, larvae feeding on the xylem of the branches, septating 1 row of excrement holes at a certain distance, mostly along the pith. Food, resulting in broken branches or withered.

Morphological characteristics Adult body length 11-26mm, wings 30-50mm, male than female, body gray. Female antennae are filiform, with a male base half feathered and filamentous at the ends, both black and covered with white scales. The thoracodorsal blue bluish spots were 6 in 2 longitudinal columns, and the abdomen and dorsal nodes had 3 blue and green vertical stripes. Each had blue bluish spots on each side and 3 spots on the ventral surface. The front and back wing veins were covered with a blue-blue short slanted marking and the outer edge of the vein was spotted. The hind wings are spotted lighter. In the middle of the female hind wing, there is a large blue-green round spot. Egg oval, long lmm, beige to tan. Larvae are 20-35mm long, red, yellowish-brown or light russet, yellow-brown to black on the front of the chest shield, and 4 rows of comb-like dentate near the center of the posterior border. dark brown. The dragonfly is 16-27mm long and has brown luster. On the back of the 2-7th abdominal section, there are 2 cross-bumps and 6 on the abdomen.

Life habits Shanghai, the Yangtze River Valley, l generation, Jiangxi, Taiwan and other places in 2 generations, are larvae in cotton, wood mold, peach trees and other trees in the stems of winter. In mid-June in Shanghai, phlegm and feathers emerged in mid-to-late June. The eggs were laid on cotton leaves. The newly hatched larvae bore the cotton petioles or twigs. After the larvae were slightly larger, they turned to coarse branches or main stems to destroy cotton moisture. Supply; tea tree, mulberry and fruit tree victim larvae feed up along the pith. In the 2nd-generation zone, Jiangxi will turn from mid-April to late-June, and will spend 13 to 37 days in the flood season, and emerge from mid-May to mid-July. Adults live in a nocturnal cycle, with phototaxis, mating and spawning soon after emergence. Eggs are produced in pelvic seams and holes. Spawning period is 1-4 days. The number of single female eggs is 224-1132, and the average life span of adults is 43. Days, egg period 9-15 days. The eggs of the newly hatched larvae were fed on the egg masses. After 2-3 days, they climbed above the branches and drooped. The larvae invaded from the buds above the shoots and withered above them. After 5-7 days, they were rotted again. The thicker branches, when plunged, first loop around the skin for 1 week, so the upper part is dead, and then feeds up inside the xylem. After the old mature, it turns into a feather hole and then builds a chamber in the tunnel. When the head and chest extend feathering holes, the clam shell remains at the mouth. The first generation of adult worms occurred from August to September, and the second generation larvae overwintered in the tunnel after the fall. The natural enemies have bees and beaded fungus.

Control methods (1) Combine cotton fields with other pests to treat or burn them as soon as possible to reduce overwintering larvae in stems. (2) When sawdust-like insects are found around the damaged wood patterns, fruit trees and other host trees, the insect branches are cut off in time to prevent feathering and enter the cotton field to lay eggs. (3) Cotton stalks are killed and the larvae are killed when the cotton is damaged. (4) Tea tree, mulberry and fruit trees are cut off in time when they are victimized, and burned or buried in a concentrated manner. After 1-2 years, they can be controlled. (5) Combining adult pests with 50% parathion EC 2 000 times or 10% Bromma EC 1000 times, 20% Chrysanthemum EC 1500 times, 20% Chlorama EC 2000 times, 2 .5% kungfu emulsifiable concentrate 3000 times solution, 21% extermination emulsifiable concentrate emulsifiable concentrate 3000-4000 times solution, 30% peach Xiaoling emulsifiable concentrate 2500 times solution, 2.5% Uranus emulsifiable concentrate 1500 times solution.