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. Characteristics of larvae larvae eat cotton, jute stems, so that the upper part or all withered; damage mulberry, tea and fruit trees, larvae eat the stem xylem, bite a row of fecal hole at a certain distance, more along the pith upward feed , resulting in broken branches or withered. Morphological characteristics Adult body length 11-26mm, wings 30-50mm, male than female, body gray white. Female antennae filamentous, male base half feathery, end filamentous, are black, covered There are white scales. The back of the chest has blue bluish spots 6 in 2 columns, and the abdomen and back of each section have 3 rows of cyan and blue stripes. Each side has a cyan spot 1 and the ventral side has 3 spots. The heel veins were covered with blue-blue, short-squined markings, and the outer edge of the veins was spotted. The hind-wing spots were lighter in color. The middle of the female hind-wings had a larger bluish-green spot. Egg oval, long lmm, beige to tan. Larvae body length 20-35mm, red, head yellowish brown or light auburn, the front chest shield yellow brown to black, near the center of the rear edge of the four rows of comb teeth back Columns, gastropods hook double order ring, hip plate dark brown. Sputum long 16-27mm, brown shiny, 2-7 abdominal section on the back of each with two transverse bulge, abdomen with a thorn 6 pairs. Living habits Shanghai, the Yangtze River Valley l generation, Jiangxi, Taiwan and other places 2 generations old, are larvae in cotton, wood mold, peach trees and other tree stems in the winter. Shanghai in mid-december, June, in mid-June In the late eclosion, the eggs are laid on the cotton leaves. The newly hatched larvae bore the cotton petiole or twigs. After the larvae are slightly larger, they switch to coarse branches or main stems to destroy the cotton water supply; the tea tree, mulberry and fruit trees are infested with the larvae. The department up for food. The 2nd generation area, Jiangxi from mid-April to late June, phlegm, flood season 13-37 days, from mid-May to mid-July. Feathering. Adults grow nocturnal, have phototaxis, mate soon after emergence. , Spawning, egg mass produced in skin seams and holes, spawning period 1-4 days, single female egg volume 224-1132, average adult lifespan 43 days, egg period 9-15 days. Newly hatched larvae cluster egg mass On the egg shells, 2-3 days later climbed above the branches. The drooping of the silks spreads with the wind. The larvae invaded from the buds above the shoots and withered above them. After 5-7 days, they turned off the thicker branches. When entering the first subcutaneous loop around the first week, so the upper part of more dead, and then feed up in the xylem, after the old mature l feather hole and then build a room in the tunnel phlegm, feather head when the chest Ministry of feathers emerged out of the hole, the remains of the oyster shell at the mouth. The first generation of adults occurred from August to September, the second generation of larvae in the autumn after the tunnel branches in the overwintering. The natural enemies have bees, beaded Fusarium. 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 2000 times or 10% Broma EC 1000 times, 20% chrysanthemum EC 1500 times, 20% Chlorella EC 2000 times, 2.5 times % Kung Fu 3000 times EC, 21% kill EC 3000-4000 times, 30% Tao Xiaoling EC 2500 times, and 2.5% Uranus EC 1500 times.