Recently, the newspaper's agrochemical expert Zhang Lining investigated in a cucumber shed in Jiyang and Shanghe counties in Shandong Province. He found that the greenhouse cucumbers in this greenhouse were seriously harmed by thrips. When the cucumber is damaged by the thrips, the growth point is torn down and the leaves are curled. When the thrips start to occur, it is difficult to distinguish them with the naked eye. Therefore, it is easy for the vegetable grower to treat the thrips damage as a cucumber green mottle virus disease. The diagnosis is incorrect, the medicine is not symptomatic, and the disease is not achieved. To control effect.
When talking with vegetable farmers, Mr. Zhang discovered that some vegetable farmers had a misunderstanding. They thought that the Hummer should only occur during the hot season. Therefore, in the cold season, the degree of damage to the greenhouse thumps was often underestimated and insufficient attention was paid to their understanding of the harm symptoms. Unclear.
The warm temperature in the winter greenhouses has created a good living environment for Hummer. Hummer harms cucumbers and leaves cucumbers with chlorosis and yellow spots. Some cucumbers have undesirable symptoms such as slender waist, big head, and peel rust. After the melons were damaged, the melon strips were stained by insects. Sometimes black thrips can be found in the flower buds of cucumbers.
Hummer horses that endanger cucumbers are mostly jaundice horses, and yellow pods use sap from young shoots, young leaves, flowers and young larvae of adult cucumbers and nymphs to grow cucumbers. After the cucumber is killed, the heart leaves do not expand normally or even dry without buds. The buds or young leaves shrink or curl, and the tissues become hard and brittle. Plants grow slowly, internodes shorten, and there are clusters. After the young melon suffers, the fruit is hardened, deformed, and the hair grows grayish brown or black-brown. The growth is slow, the peel is rough, and the skin is covered with "rust", and when it is severe, the fruit is dropped. In the case of cucumbers that are damaged by thrips, the leaves are prematurely aged, brittle, and curled and look like cucumber green mottle virus disease.
The weather has not yet entered the deep winter. The temperature in the greenhouse is very high, especially at noon, and with the high temperature management of cucumbers on weekdays, the temperature in the shed during the day is about 32°C. This temperature is suitable for the growth and development of thrips. . According to Mr. Zhang’s introduction, in the sheds he investigated, it was found that the area of ​​the hummer horses was not small, and the average shed strain rate was 15%-30%. Individual sheds also tended to occur. Therefore, it was necessary to draw the attention of the majority of vegetable farmers. The winter greenhouses should still pay attention to the prevention and control of thrips, so as to avoid causing major losses. The following measures can be taken to control thrips in greenhouses:
1. Physical control. Hang the blue plate to seduce the adult, and hang a blue plate about every 10 meters, which is slightly higher than the cucumber growth point 15-30 centimeters, in order to reduce adult egg lay damage.
2. Chemical control. Choose agents that are effective against sucking mouthparts, such as 25% imidacloprid WP 2000 times or 5% acetamiprid WP 2500 times or 2.5% Vegetable HX 1000-1500x or 25% A Ke Tai water dispersible granules 5000-6000 times, uniform spray, 5-7 days once, alternating 2-3 times.
Coarse grain usually refers to rice, wheat, corn, soybean and potato five crops other than the grain and bean crops. The main are: sorghum, millet, buckwheat (sweet buckwheat, buckwheat), oats (naked oats), barley, millet, barley millet, barley millet, grain amaranth and beans (kidney beans), mung beans, adzuki beans (adzuki beans, adzuki beans), broad beans, peas, cowpea, lentils (soldier beans), black beans and so on. It is characterized by short growing period, small planting area, special planting area, low yield, and generally contain rich nutrients. The ancient Chinese medicine book "Huangdi Neijing" records that "five grains are for raising, five fruits are for helping, five livestock are for benefiting, and five vegetables are for filling". Some trace elements, such as iron, magnesium, zinc and selenium, are more abundant in coarse grains than in refined grains. The value of these trace elements to human health is considerable. Coarse grains are also richer in potassium, calcium, vitamin E, folic acid and bioflavonoids than refined grains.
Whole Grains are rich in nutrients. Oats, for example, are rich in protein; Millet is rich in tryptophan and carotene. Beans are high in quality protein; Sorghum is rich in fatty acids and iron; Tubers contain carotene and vitamin C. In addition, coarse grain still has the effect of reducing weight. Such as corn also contains a lot of magnesium, magnesium can strengthen intestinal wall peristalsis, promote the excretion of body waste, is very beneficial to weight loss.
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