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a)Ultra low volume spraying:
-The ULV spraying is the method of pesticide application at minimum volume to achieve economic pest control.
-In this technique of pesticide application the volume applied per hectare is less than 5 litres which is extremely low as compared to the conventional High Volume and Low Volume spraying methods.
-The spray droplets in ULV spraying methods are very fine in size. Therefore, the nozzles used in these methods are different. Various designs of rotary atomizer are used to generate droplets of 70 to 100 µ VMD.
b)Electrostatic spraying
-The electrostatic spraying system reduces the application volume substantially and greatly improves pesticide deposits.
-The liquid atomization is achieved by utilizing electrostatic forces.
-The spray particles of about 50 µm size having high electrostatic charge are issued from the nozzle through induction or contact charging which creates ions of similar polarity to the liquid droplets which become electrically charged.
-The application volume is drastically reduced to 0.5 to 1.0 L/ha besides much improved deposition of pesticide.
-The charged droplets leaving the nozzle repel each other owing to similar charge and thereby forming spray cloud.
jim items answered the question on April 11, 2019 at 17:50
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