Liriomyza sativae mainly uses the mesophyll cells and petioles between the upper and lower epidermis of the larvae to feed on the leaves of the plants. Adult feeding and oviposition holes can also cause some damage. He likes plants such as legumes, cucurbits and Solanaceae. The main types of harmful vegetables include: cucumber, gourd, and zucchini of the Cucurbitaceae; tomatoes, peppers, and potatoes of the Solanaceae; kidney beans, peas, cowpeas, etc. of the leguminous family; lettuces, lettuces, and garland chrysanthemums of the Asteraceae; Mustard, cabbage, cabbage, radish, etc.; celery in the Umbelliferae family and leeks in the family Polygonaceae. Adults can be transferred, spread and harmed.
First, living habits
1. The highest occurrence of adults of Liriomyza sativae usually occurs in the morning and is most active around noon. Rainy days inhabit the backside of the leaves, and activities occur at the lower part of the plants at high temperatures. Adults have light, honey, yellow and green. The suitable growth temperature of larvae is 20 -30°C, and the development period is 4-7 days. If it is over 30°C or lower than 20°C, it will develop slowly and the mortality of immature larvae is high. Therefore, the spring and autumn are the recurrence of this worm. Period, adult life is generally 7 to 20 days. 2. The fly ability of adult Liriomyza sativae is limited, and long-distance propagation is the main route for transporting host plants. Among them, the leaves with worms are mainly used for long-distance transmission, and plant residues such as stems and vines are secondarily transmitted.
Second, the symptoms of damage
A, larvae feeding on the leaves of ornamental plants, leaving the hole, causing damage to adult insects, reducing the ornamental value of the plant. B. The larvae feed on the leaves and the stabbed leaves of the adults directly affect the light and function of the plants, and reduce the photosynthetic rate and nutrient conduction of the leaves of the plants, resulting in a decrease in yield and a decrease in quality. C. The wounds caused by Liriomyza sativa have provided invasive pathways and breeding sites for other pathogens, but they can also transmit a variety of viruses themselves, aggravating the damage to plants.
Third, comprehensive prevention
1, agricultural control:
A, rational distribution of vegetables and vegetables. The rational distribution and rotation of its hobby crops and light-victim crops such as bitter melon, onion, garlic or non-host crops. B. Clean the vegetable garden and worsen the living conditions of pests. Remove weeds from the field and remove diseased leaves. Once harvested, all the remaining vegetables, leaves, and weeds are removed in a timely and thorough manner, brought out of the field for destruction, swept their breeding sites, and reduced or eliminated the source of insects.
2. Physical control: A. According to the habit of yellowing of Liriomyza huidoris, the yellow plate was used to kill the adult of Liriomyza sativae. B. Using solar energy for high temperature disinfection and insecticide. In the summer and autumn seasons, the use of facilities during the idle period, the use of closed greenhouses, greenhouse measures, selected sunny high temperature stuffy shed for a week or so, so that the maximum temperature within the facility reached 60 -70 °C, can kill pests. In the vegetable garden, the method of covering the plastic film, deep-turning the soil, and covering the plastic film may be used to make the ground temperature exceed 60° C., so as to achieve the purpose of high-temperature insecticidal and deep-buried eggs.
3. Chemical Prevention and Control: A. The field adopts the “six unifications†measures. Unified command, unified time, unified pharmaceuticals, unified dispensing, uniform application, and unified inspection. The application of pesticides from the planning and control area around the center to surround the application of the method. B, master the medication time. The control of larvae is generally best before and after the morning dew does not dry. C, select the appropriate agent. When the larvae dive into the tunnel for the proper time of application, the back of the blade is sprayed, and high-efficiency, low-toxicity, low-residue chemical pesticides can be used, such as 1.8% inoculum 3000 times solution, or 1.8% abutin 3000 times. Liquids with strong absorbability should be used alternately, sprayed every 5 days, and sprayed 4-5 times. Pay attention to the variety of drugs can not be a single, nor a variety of mixed, so as to avoid resistance. D. Take measures to utilize the phototaxis of Liriomyza sativae. Liriomyza is particularly fond of feeding and spawning on bean pods, followed by Chinese cabbage. A row of dwarf beans and pakchoi can be planted at the front of the greenhouse. In the morning, the front of the greenhouse will be rolled up with a height of 1 meter. The spotted fly will fly to the front of the light and fall on its favorite food. , spawning and inhabiting plants. When all of the cold-resistant bedding or straw curtains are uncovered, immediately kill the adults with enemy-killed or pungent and highly effective contact pesticides, and appropriately increase the concentration, and spray the plants on the front of the greenhouse, such as navy beans. Repeat spraying several times every 5 days. It can kill almost all the adults of the leafminer in the greenhouse, and it does not produce phytotoxicity to vegetables.
First, living habits
1. The highest occurrence of adults of Liriomyza sativae usually occurs in the morning and is most active around noon. Rainy days inhabit the backside of the leaves, and activities occur at the lower part of the plants at high temperatures. Adults have light, honey, yellow and green. The suitable growth temperature of larvae is 20 -30°C, and the development period is 4-7 days. If it is over 30°C or lower than 20°C, it will develop slowly and the mortality of immature larvae is high. Therefore, the spring and autumn are the recurrence of this worm. Period, adult life is generally 7 to 20 days. 2. The fly ability of adult Liriomyza sativae is limited, and long-distance propagation is the main route for transporting host plants. Among them, the leaves with worms are mainly used for long-distance transmission, and plant residues such as stems and vines are secondarily transmitted.
Second, the symptoms of damage
A, larvae feeding on the leaves of ornamental plants, leaving the hole, causing damage to adult insects, reducing the ornamental value of the plant. B. The larvae feed on the leaves and the stabbed leaves of the adults directly affect the light and function of the plants, and reduce the photosynthetic rate and nutrient conduction of the leaves of the plants, resulting in a decrease in yield and a decrease in quality. C. The wounds caused by Liriomyza sativa have provided invasive pathways and breeding sites for other pathogens, but they can also transmit a variety of viruses themselves, aggravating the damage to plants.
Third, comprehensive prevention
1, agricultural control:
A, rational distribution of vegetables and vegetables. The rational distribution and rotation of its hobby crops and light-victim crops such as bitter melon, onion, garlic or non-host crops. B. Clean the vegetable garden and worsen the living conditions of pests. Remove weeds from the field and remove diseased leaves. Once harvested, all the remaining vegetables, leaves, and weeds are removed in a timely and thorough manner, brought out of the field for destruction, swept their breeding sites, and reduced or eliminated the source of insects.
2. Physical control: A. According to the habit of yellowing of Liriomyza huidoris, the yellow plate was used to kill the adult of Liriomyza sativae. B. Using solar energy for high temperature disinfection and insecticide. In the summer and autumn seasons, the use of facilities during the idle period, the use of closed greenhouses, greenhouse measures, selected sunny high temperature stuffy shed for a week or so, so that the maximum temperature within the facility reached 60 -70 °C, can kill pests. In the vegetable garden, the method of covering the plastic film, deep-turning the soil, and covering the plastic film may be used to make the ground temperature exceed 60° C., so as to achieve the purpose of high-temperature insecticidal and deep-buried eggs.
3. Chemical Prevention and Control: A. The field adopts the “six unifications†measures. Unified command, unified time, unified pharmaceuticals, unified dispensing, uniform application, and unified inspection. The application of pesticides from the planning and control area around the center to surround the application of the method. B, master the medication time. The control of larvae is generally best before and after the morning dew does not dry. C, select the appropriate agent. When the larvae dive into the tunnel for the proper time of application, the back of the blade is sprayed, and high-efficiency, low-toxicity, low-residue chemical pesticides can be used, such as 1.8% inoculum 3000 times solution, or 1.8% abutin 3000 times. Liquids with strong absorbability should be used alternately, sprayed every 5 days, and sprayed 4-5 times. Pay attention to the variety of drugs can not be a single, nor a variety of mixed, so as to avoid resistance. D. Take measures to utilize the phototaxis of Liriomyza sativae. Liriomyza is particularly fond of feeding and spawning on bean pods, followed by Chinese cabbage. A row of dwarf beans and pakchoi can be planted at the front of the greenhouse. In the morning, the front of the greenhouse will be rolled up with a height of 1 meter. The spotted fly will fly to the front of the light and fall on its favorite food. , spawning and inhabiting plants. When all of the cold-resistant bedding or straw curtains are uncovered, immediately kill the adults with enemy-killed or pungent and highly effective contact pesticides, and appropriately increase the concentration, and spray the plants on the front of the greenhouse, such as navy beans. Repeat spraying several times every 5 days. It can kill almost all the adults of the leafminer in the greenhouse, and it does not produce phytotoxicity to vegetables.
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