Application of pesticides in the spring to avoid injury

After entering spring, the temperature gradually rises, and the vegetable crop enters a period of vigorous growth and fruition. It is now at the peak of winter vegetable production. In particular, after the temperature rises, the evaporation of water increases and the humidity in the field increases, which is also a period of high incidence of disease. With the increase in the amount of drugs used in disease prevention and control, and frequent occurrence of drug injuries, many such consultations have been received recently. Light yellow leaves are damaged, and heavy leaves are dropped, growth stagnates, and losses are serious. In the management of vegetables in the spring, how to avoid the occurrence of drug injury should pay attention to the following aspects:

1. The choice of medical devices. Because of its advantages of high pressure, fine spray, time saving and labor saving, the power sprayer is the first choice for medicine equipment. However, when choosing fuel-assisted medicinal herbs for spraying, be sure to select sunny weather and use under normal ventilation conditions. Because under the conditions of low temperature and high humidity in the greenhouse, fuel combustion is not sufficient, and fumes emitted will cause great damage to crops. During the spraying process with such devices, it is necessary to ensure adequate Ventilation time, emit harmful fumes. Prior to spraying, the electric medical device must be filled with electricity in the battery to ensure sufficient power supply to achieve uniform spray. Again, the choice of spray jets is based on the pressure of the sprayer and the spray effect on the blade.

2. The choice of spraying time. When the temperature is appropriate in spring, the growth of the crop is large, the organs and tissues are relatively young, and the stimuli to the drug are strong and the drug resistance is poor. Therefore, the choice of spraying time in the greenhouse is also the key to avoiding the occurrence of phytotoxicity. Spraying should be done on a sunny day, but avoid high temperatures. After the spray is completed, sufficient ventilation time should be ensured so that the liquid not only infiltrates the leaves but also evaporates the water for too long and too short. The control effect. Especially when the aerosol is fumigated and prevented, the fumigation time should be strictly controlled so as to avoid the occurrence of phytotoxicity and smoke damage.

3. Dosage types should not be too much. Spring is a period of high incidence of various diseases, and there are many kinds of diseases mixed and flooded. Although a variety of diseases occur at the same time, but the use of drugs should be a reasonable choice, the type of mixing should not be too much one-time, but do not arbitrarily increase the dosage. When multiple diseases are mixed, prevention and control can be carried out by classification, and two kinds of diseases with severe disease can be selected simultaneously to carry out different drug spray prevention and control. Adhering to the principle of "having a series of disease prevention and control and using drugs mixed together to ensure safety", it is effective in treating diseases and preventing disease, but also to ensure the safety of plant drugs.

Optical Mirror

High-quality optical mirrors are available for use with light throughout the UV, VIS, and IR spectral regions.
Choosing the proper reflective coating option ensures high reflectivity of the needed wavelength or wavelength range.
The reflector is processed by precision numerical control molding and polishing, and the inner surface is coated with a reflective reflective optical film. The light spot has a good focusing effect, the light source has high efficiency, and the emitted light and heat radiation is low. , Good color rendering index.


Protected Aluminum Mirror: Ravg>90% 0.4-0.7μm

Enhanced Aluminum Mirror: Ravg>92% 0.45-0.65μm, Ravg>90% 0.19-0.4μm

Protected Silver Mirror: Ravg>95% 0.5-0.8μm, Ravg>95% 2-10μm

Protected Gold Mirror: Ravg>84% 0.7-0.8μm ,Ravg>95% 0.8-2μm

Dielectric Mirror Mirror: Ravg>99.9%>400nm, Ravg>99% 0.25-0.4μm

Mirrors


Optical Mirror,High Reflective Mirror,Custom Optical Mirror,Custom Optical Aluminum Mirror

ChangChun Worldhawk Optics Co.,Ltd , https://www.worldhawk-optics.com