The four major fishes refer to grass carp, herring, squid, and squid. Grasping the broodstock cultivation of the four major fishes in autumn will allow the broodstock to accumulate fat, promote gonad development, and increase the amount of egg-laying. This is an important part of raising t.......
Most of the plant-based insecticides, whether used alone or in combination, not only reduced the rate of pests and plagues, but also significantly reduced the weight of pods compared with the control group. This indicates that the phytochemical insecticide not only interferes with pest feeding.......
(1) Formula wheat flour or corn starch 1 part, cement 0.8-1 part, animal and vegetable oil 0.1 part, sesame oil a little. (b) rodent control method According to the ratio of raw materials, mix the flour and cement evenly, then pour in a small amount of animal and vegetable oil and sesame oil, .......
Every year, there are fruit growers who can not grow strong grape seedlings and virus-free grape seedlings. The reason is that they have insufficient experience or are relaxed in management. The quality of grape seedlings depends on the management of summer and autumn. The methods are:
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Pesticides are an important means to control pests and diseases. They play an important role in the comprehensive prevention and control of diseases and insect pests. Even the production of AA grade green fruits is not a complete use of pesticides. At present, the pesticide market is extremely.......
1, mare pregnant look ear hair. 20 to 90 days after the mare mating, see the change in the shape of the hair on its tip. If you see the two ears, hair gradually close together, tighten and straight and tighten, shaped like a small bristle tip, as pregnant; unpregnant two-eared hair showed loos.......
There are many varieties of fruit trees, which can be generally divided into five stages: the young tree stage, the early stage of the result, the period of the result, the later stage of the result, and the aging period. The requirements for nutrient elements are different in each period. In .......
First, the damage symptoms mainly damage the leaves, but also harm the stems and pods. Leaves suffer, the leaves begin to produce white powdery yellow spots, and then gradually expand into irregular spots, and meet each other, the lesions covered with a layer of white powder, severe leaves yel.......
Oxygen atom sterilization test report Monitoring the sterilization effect of oxygen atoms in the air (1PPM = 2mg/M3) Strain concentration (PPM) Time (minutes) Kill rate (%) Bacillus subtilis 0.50.93.03.5510204099.99100100100 S. typhimurium 0.20 .515100100 Sonnerella sp. 0.20.515100100 Staphylo.......
Japan’s independent administrative agency, the Agricultural Technology Research Institute, announced that it has made the use of rice biopesticides practical. This is the first time in the world. The biopesticides use bacteria to prevent rice disease. The biopesticides will be sold on D.......
Demand for nitrogen, phosphorus, potassium, and zinc is greater for corn. If it is lacking, it will lead to deficiency of the disease, and the light will grow slowly. In severe cases, the yield will be reduced significantly, and empty grains will be added to affect quality. In case of prolonge.......
The empty stem or hollow of broccoli refers to the hollow stem of the main stem of the commercial flower bulb, but it does not rot and is formed due to a physiological disorder. Empty stems are a poor commercial character. Markets, especially foreign markets, require commodity stems without em.......