Plutella xylostella, a genus of diphtheria, belongs to the Lepidoptera Plutellae family. The host is mainly cruciferous vegetables and wild cruciferous plants, mainly cabbage, cauliflower, cabbage, radish, rape, cabbage and various vegetables. The first-instar larva only feed on the leaf, leaving ......
Check the appearance of the product: from the front, back, left and right, see if the entire machine has any distortion, there is no place for rust, the sheet metal part is not smooth, there is no paint leakage, flow paint, castings with or without pores, trachoma, burrs, Whether the color and thi ......
Use a low temperature tank - low temperature thermostatic tank to add liquid medium in the front tank, the liquid level of the medium should be lower than the working table 30mm , otherwise the heater will be damaged when the power is on; 2. The selection of liquid medium in the cryostat should me ......
Rational fertilization is to maximize the use of effective nutrients in fertilizers, improve fertilizer use efficiency, but also to improve crop yields, improve quality, and obtain significant economic benefits; it is necessary to be conducive to fertility, protection of agricultural products and t ......
            Development and performance of domestic nucleic acid protein detector Chromatographic separation technology is the basic experiment in the "Biochemical Analysis Experiment" of Chinese universities. In the late 1970s , the "nucleic aci ......
Low-temperature treatment: Celery seeds are sunned for 1 day 10 days before sowing, soaked in cold water for 24 hours, and changed once every 8 hours. Then knead the seeds, rinse with water, and remove impurities until the water is clear. The seeds were wrapped with gauze, squeezed out of some of ......
1. Fertilizer pool water. Before the winter, the broodstock pond should be fertilized. Normally, about 667 square meters (1 mu) of water is used per week to compost about 500 kilograms of manure and livestock manure (including 70% of the total amount of fertilized manure in the carp pond, which ac ......
Details of ZK-LZ metal tube float flowmeter : I. Overview of metal tube float flowmeter LZ series metal tube float flowmeter is a variable area flow meter based on float position measurement. It adopts all-metal structure and Modular concept design. Because of its ......
1. Although the shape of grain seed seeds generally has different types such as horse tooth shape, garden shape, ellipse shape, flat shape, long shape, and rectangular shape, no matter what type it belongs to, it must be uniform, neat, and angular. The uneven surface of the particles is equal, and ......
In recent years, Tu Yuan has been widely used as a tonic, and now many hotels and restaurants have enjoyed the “insect feast†and Tuyuan has also become a delicacy. Surveys show that at present, the output of the land yuan is less than 20% of the amount used, and the contradiction betw ......