1. Hazardous 1.1 1.1. Liriomyza sativae and larvae can all be harmful. The female adults fly and injure the leaves of the plants to feed and lay eggs. The larvae invade the leaves and petioles and produce irregular snake-like white insects. The chlorophyll is destroyed, affecting photosynthesis, and the heavy leaves of the victims fall off, resulting in flower buds. The fruit was burned and severely damaged. In the initial stage of L. sativae, the worm tract was irregularly stretched, and the terminal of the larvae often became distinctly different from that of the tomato. The damage rate of the affected plots was 30-100%, and the output was reduced by 30-40%. 1.2 Liriomyza huidobrensis adult ovipositor spawns eggs in the leaves. After hatching, the larvae eat leafy leaves between the upper and lower epidermis of the leaves. They eat ribs and veins, and the leaves become transparent plaques, causing the seedlings to die. Destructive. The larvae usually form a subterranean passage along the veins, and the larvae also feed on the sponge tissue beneath the leaves. The sinus is often incomplete from the leaf surface, unlike the L. sativae. 1.3 Liriomyza: Liriomyza larvae larvae after eating hatched leafy meat, showing twists and turns of food marks, 2-7 leaves in the seedling stage suffer more damage, serious latent marks, resulting in yellow, scorch or fall off leaves. The width of the insect pathway is not significantly widened. It is a special evidence that the worm and the spot-fly, Liriomyza huidobrensis, and Liriomyza sativae differ. 1.4 The larvae of the larvae of the pea larvae are harmed, and the leaves of the larvae leave the upper and lower epidermis, forming a tortuous tunnel and affecting the growth of the vegetables. After the peas are affected, they affect the fullness of the pods and the seed quality and yield. 2. Comprehensive prevention and cure method 2.1 Low-temperature freeze-drying ridges Before the nursery was raised in January in winter, the greenhouses were exposed to low-temperature environment for 7-10 days, naturally frozen, and the overwintering insect resources were eliminated. The high-temperature stuffy shed is to seal the shed for 7-10 days in the summer when the high temperature is changed. The specific method is to not remove the remaining stubbles after harvesting of the upper pod crops. The sheds will be completely closed and the occassion will not be open until the daytime. Temperatures of 60°C-70°C kill a large number of pests and diseases. After the treatment is completed, the remaining sheds will be eliminated, which will save labor and labor, and will prevent the spread of insects to open areas. 2.3 Covering insect nets Insect nets are installed at the vents of protected areas in autumn and spring to prevent the exchange of insect sources between open and sheds. 2.4 Suspension of yellow plates to trap adult larvae is to set up yellow plates in the protected area to trap and kill adults of Liriomyza spp. in the protected area. If the yellow plate's hanging height is maintained at a height of 20 cm above the crop growth point and the yellow plate's adhesiveness is maintained, it can be received. Good results. 2.5 Pharmaceutical Control
2.5.1 smoke smoked adults. That is, when a large amount occurs in the protected area, the specific method is to use 500 grams of 10% dichlorvos per acre, or fenvaleril vinegar smoke (according to the amount of instructions) to kill adult insects, effective, but generally have to use 2- 3 times. 2.5.2 Foliar spray kills larvae. Spraying foliar surfaces with plant-derived insecticides and highly effective and low-toxicity insecticides: if it is a case of Liriomyza sativae Blanchard and Liriomyza yezoitia, it is required to spray on the frontal surface of the leaves. If it is a case of Liriomyza huidobrensis, the leaves must be positively and negatively reversed. Spray on both sides. Specific agents include 3000 times of diflubenzuron, 2500 times of diflubenzuron, 500 times of liquid smoke, 1500 times of spot latrine, and 3000-5000 times of avermectin.
Magnesium Phosphate
Magnesium Phosphate Price,Magnesium Phosphates Dibasic Price
Co., Ltd. , http://www.chfoodadditives.com