Pesticide spraying today
The pesticide spraying is stipulated by numerous laws of good practice and legislative requirements which are some of the most rigorous in the world. Observance of these legislative regulations is mandatory taking into account protective measures as well as economic prerequisites and considerations. The main classes of chemicals used for pesticide spraying include insecticides, fungicides, nematocides, herbicides, and growth regulators.
How to carry out pesticide spraying
Pesticide spraying is one of the most frequent methods used for pesticide application. Operators realize pesticide spraying by means of special mechanical sprayers. Classical pesticide spraying is accomplished with hydraulic sprayers that consist of tanks, pumps, lances or booms, and nozzles. Pesticide formulations contain mixtures of water and chemicals. Sprayers transform pesticide formulations into droplets of different sizes. Droplets can take the form of large or small particles. The conversion into droplets during pesticide spraying is realized by pressure that forces the sprayed pesticide through the nozzle. The size of droplets may be changed owing to the nozzles of various sizes. The size of droplets may be also altered by changing the pressure under which the mixture is forced through the nozzle. The droplet size is as well dependent on particularities of the biology and life cycle of the pest. Large droplets require more water but rare undergo spray drift. Small droplets require still atmospheric conditions, but allow maximum contact with a target pest.
Technical aspects of pesticide spraying
It is important to ensure the quality of pesticide spraying by means of testing and establishing the advanced standards for application equipment. During handling of the chemicals and pesticide spraying the operators must wear protective clothing and use protective equipment. Pesticides are very expensive and must be sprayed only for substantiated reasons. During the pesticide spraying the operator constantly regulates the application level so that the pests were reliably controlled while the crop growth. In some cases pesticide spraying is carried out by a sprayer attached to the back of a tractor. Successful practice of pesticide spraying presupposes that the operator first sprays the field body and then goes round the outward edge. This approach reduces the risk of pesticide transfer to the tractor wheels.
Conditions for pesticide spraying
Pesticide spraying must be carried out only when the weather conditions are favorable and the crop growth is at the acceptable stage. Practically it means that there must be a light breeze and no rain. Extremely hot weather and motionless air are not appropriate for pesticide spraying. Entire pesticide spraying should be realized in agreement with the special instructions for pesticide application. The operator must always take into consideration the particulars of any pesticide application such as weather conditions, the quantities of pesticides, the amount of used water, and the time of the procedure. The contemporary sprayers for pesticide spraying are controlled electronically and their calibration is very precise.