How to use Contact fungicides such as pencycuron

pencycuron is a commonly used Contact fungicides,their effect is protection plants and Prevent germs.　we shoule be attenion details when we used

1. pencycuron should be used before the crops are effected with the germs and spray on the crops welldistributed,if　the germs have been effected the plants ,spray pencycuron is no use
2. pencycuron spraying must be well-distributed ,or the plants will not be proctected all-sided
3.Must pay attention to the effective protection period. After applying the pencycuron, the new growing leaves and branches which are without protection of pencycuron, will still be infected.The interval time of spraying pesticides is 7 to 10 days, so, after the first spray, still need to be done for the second time in 7 to 10 days. Some vegetables grow in a long period, need to spray three to fivetimes or more.
4. pencycuron spraying must look out the dose,enough water.we　can"t change the　dose　and must keep the soup on all of the leafs.

Yangzhou pioneer chemical CO.,LTD