Do you often see the winding road on some of the blades, at first glance like the kind of "ghost character", with a little artistic charm! Take a closer look, then kill the dead! There is a kind of pest hidden in the original road. It only eats and eats. Slowly, the leaves of your family's vegetables will become full of sorrow, which will not only affect the appearance, but also affect the growth of the plants! What kind of ghost is this "ghost character"? Today must be cured of their arrogance! "Ghost character" is our common name for this kind of pest, and it is actually a leaf-flying fly, also called a leaf fly! The real body of "Ghosts" 1. True identity Liriomyza sativae, Liriomyza huidobrensis, Liriomyza sinensis, etc. (In the eyes of the vegetable farmers, they are all leaf miners. These three species were imported from abroad before, and then spread to many provinces in the mainland)! (Amplified appearance of a certain spotted fly adult) 2, the types of vegetables that are harmful Tomatoes, cucumbers and other melons, cowpeas and other beans, vegetables and so on. 3. Hazard means Adults will stab the leaves, absorb the juice, and lay the eggs under the epidermis, causing the leaves to yellow. The larvae feed on the potential leaves, forming a curved, irregular white worm. 4, the severity of the hazard 1. Harmful In particular, cucumbers, loofahs, cowpeas, and tomatoes are the most seriously affected. Generally, the yield is reduced by about 25%, and the serious reduction can be 80% or even no harvest. 2. Concealed hazard, strong reproductive ability It is often the case that crops are seriously harmed before they are thought of. 3. Serious drug resistance Resistance to pesticides is rapid, and the differences between the north and the south are large, leading to incomplete control. Prevention analysis 1. Do the most important preventive measures At the peak of pests, the leaves of the insects are removed in time and incinerated; (don't pick them up and just throw them in the fields, the larvae in the leaves can still be phlegm, and finally the emergence becomes a source of harm!) After the vegetables are harvested, the litter is burned in time, and the soil should be turned deep below 20 cm to reduce the emergence rate of the cockroaches. 2, with the use of sticky board to trap adult Adults of Liriomyza sativae have yellowing ability. The field can be hung with a yellow roll of the same type of sticky insect board, which is usually hung on the top of the plant 20~30 cm. If it is an upright climbing crop such as cowpea, kidney bean or cucumber, it is hung at a height of 1/2~2/3 from the ground. Generally, 30 to 40 pieces are hung per acre, and the specific number depends on the degree of occurrence of the insects. 3, parasitic wasp control (suitable for organic farms) Organic farms or conditional ones can use parasitic wasps for control. As a natural enemy of the larvae of the larvae, the parasitic wasp can reach more than 50% without medicine. The parasitic wasps with better parasitic rate include the genus Apis mellifera and the larvae. 4, pay attention to medication tips, use the medicine Key fight time When the larva is 1 to 2 years old, it is the most critical period for the fight moth. At this time, the insect path is about 1~3 cm. Fighting principle When spraying, remember to be “comprehensive and thoughtful, the back of the leaf should be balanced on the back of the leaf, and the plant should be sprayed on the surface†Choose the right medicine It can be mixed with avermectin, beta-cypermethrin, chlorfenapyr, and carbaryl salt. It is used in the critical period of prevention and control. Hui Nongwang Xiaobian reminded: the prevention and control of spotted fly flies should be unified and ruled. Do not use the same kind of pesticides repeatedly. Pay attention to the use of pesticides alternately. It should be continuously controlled, usually sprayed once every 7~10 days.
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