2011年11月16日星期三

fungicide's category such as pencycuron and its attention when used


There are two types of fungicide. One type is contact fungicides another Systemic fungicides,We must choose the right one when we use it.
Contact fungicides: Contacts remain on the outside of the plant and form a protective barrier against diseases that penetrate the leaf blade.such as pencycuron,carbendazim,and so on.
Systemic fungicides: Systemics enter inside the plant and travel throughout the plant"s vascular system. They are both protective and curative before and after the disease has started.
Fungicide such as Pencycuron should be sprayed before 9AM or after 4PM. If spraying under the burning sun, it is easy to be resolved and evaporated, adverse to crops absorbing fungicide.
Next fungicide spraying must be 7-10 days later. For the weak adhesive and poor systemic property fungicide, we should spray it again if rains during 3 hours after the first spray. fungicides can"t used with Basicity pesticides, and we can"t change dose of fungicides such as . pencycuron when we used .
fungicides are DP ,EW or JG for the most , we should diluted them when we used. But how to dilute them ? please following these three steps: put the fungicides、add water、 mixing by a stick. But please attention that we should also diluted fungicides firstly when we mix them with other pesticide

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