How to control the mulberry moth
The damage of mulberry moths. It not only eats up leaves, but when it is severe, it also crawls around the trees to disturb people. S. citrifolia is a lepidoptera noctuid family of the genus Lepidoptera. It is also known as the sage caterpillar, citron caterpillar, and yellow caterpillar. The worm is a oligophagous species. It is the main pest of the camphor tree and the mulberry tree. After being killed, it often makes the trees a second time. When germinating, the branches that are heavy are dead and the tree vigor is weak, causing serious tree death.
The S. kinensis adults are 22 to 28 millimeters in length and 56 to 66 millimeters in wingspan. They occur once a year in the city of Renqiu, Hebei Province, where they linger under the trees, in the trees, in the masonry, and in the corners of houses. Wait for the wintering. In mid-July of the following year, adult ecloses began to emerge and lay eggs. In late July, larvae began to hatch. During the early August to mid-September, larvae were at risk. In the late September, the mature larvae began to pupate and shed their winters.
Adults grow into nighttime, have strong phototaxis, do not move during the day in the dorsal and quiet place, begin to copulate at night, after 2 to 3 days of supplemental nutrition, begin to lay eggs. The eggs are often produced on leaves, arranged in a single layer, densely distributed, and unplanned. The average egg production per female is about 700 grains.
The newly hatched larvae are clustered and only eat the back of the leaf, the leaves and the upper epidermis, and eat only one leaf before transferring another leaf. The 2nd to 3rd instar larvae eat the mesophyll and lobule veins inward along the edge of the leaf, leaving large veins, and some eat the leaves as holes. After 4 years of age, the food intake increased significantly. Within a few days, the leaves were eaten and transferred. After the larvae matured, they climbed under the trees to search for suitable sites for wintering. The larvae would like to be clustered into pupa, and constant worms would overlap.
Mulberry Spodoptera control method
1. Adults have a strong phototaxis, and installation of frequency-type insecticidal light traps adults.
2. When the larvae colony damages using the habit of feeding young larvae, the insects are removed and the larvae are manually killed.
3. By using its habit of colonization and defoliation, when the old larvae are larvae, the grass is induced by the grass and the larvae are crushed and burned. The larvae can also be glued on the trunk.
4. Find the wintering crickets around the host.
5. Toona sinensis and mulberry are economic species. Do not use highly toxic pesticides. In the young instar larvae stage, spray 1000 to 1500 times of Bt WP containing 16,000 IU/mg, or 1500 to 2500 times of B. bassiana at 40 billion spores/g, or 20% suspension of diflubenzuron. The agent is controlled from 6,000 to 7000 times, or 1.2% bitter oil EC 800 to 1000 times.
6. Protect natural enemies such as sparrows, storks, dragonflies.
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