Integrated control method for greenhouse tomato thrips
Tomato growers have you found many small white circles on your own tomato, and there is a small black dot in the middle. This phenomenon occurs in the field. So how to prevent the surface of greenhouse tomato fruit?
In fact, this phenomenon is caused by the Hummer hazard. Hummer has become a major pest of vegetables and melon crops in solar greenhouses. Hummers mainly include yellow horses, palm hummers and onion horses. The first two mainly endanger the solanaceous fruits, melons, and legumes. The onion horses are mainly lily, garlic, onion and other liliaceae vegetables.
Hummer mainly sucks vegetables and nymphs with tender and slightly tender leaves, causing the damaged buds to harden and shrink, the plants grow slowly, and some will form headless seedlings. The eggplant fruit is damaged, the surface of the fruit is rough, hardened and resembles a stiff fruit; the damaged pod forms a round white depression on the fruit surface, causing the pod to lose its commerciality; the tomato is young, forming many white circles on the fruit surface, a small black in the middle Point, like ulcer disease (the lesion formed by ulcer disease in the middle of a small point, like a bird's eye). Therefore, the insect is a small, sudden pest of the individual.
The insect is an incomplete metamorphosis, a small pest of the order Thysanoptera, which can occur for more than 10 generations a year. It can be an anniversary in the greenhouse. Has the following characteristics:
1. The reproductive rate is high and it is easy to break out. Generally parthenogenetic. Each female can lay 30-100 eggs. The newly hatched nymphs feed on the tissues, and after 2 years of age, they are transferred to the surface of the plants for feeding. After 2-3 peelings, the leaves are curled, the soil is sewn, and the litter is deciduous. Complete a generation for about 10-30 days.
2. Resistant to drought, avoid heavy rain and damp heat. The developmental suitable humidity is 75%-80%, which can occur in the greenhouse.
3. Spawning tends to be tender. Adults usually hide in the back of the leaves during the day, and in the heart of the leaves, they come out to eat in the evening or on cloudy days, mainly to become tender and harmful. Generally, seedlings and top leaves, flowers, and young fruits are seriously damaged.
4. Adults have a habit of blue and yellow.
Prevention and treatment methods:
Because the insect is small, it often causes sudden damage, and the host has a wide range. In addition to vegetables and melons, it can also breed on a variety of crops and weeds. Therefore, it is necessary to adhere to the prevention and control of agriculture based on agricultural control. Main integrated prevention measures.
1. Clear the weeds in the field;
2. Rational irrigation and keep the field moist. Create environmental conditions that are not conducive to pest reproduction;
3. Hanging blue or yellow plates in the field to trap adults;
4. Chemical control. Adhere to early prevention and control, alternate medication, ground plants and ground use at the same time. 5% Regent suspension can be used 4000 times, 1% insecticidal EC 2000 times, 10% imidacloprid wettable powder 2000 times, 10% once 1000 times or 1.8% avermectin 5ml plus 4.5% high efficiency cyanide 15 ml of chrysanthemum is sprayed with 15 kg of water, once every 7-10 days, 2-3 times in a row.
The above is all about today's prevention and control of tomato thrips, and you can come to Hui Nong Network for a lot of reference!
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