Bio-control
        
 Pest mites and their web on strawberry      Predatory mites were introduced

When we begin to plant, pests will also begin their infestation.
       Many approaches have been developed to control different pests, for example, chemical control, physical control, behavioral interference and biological control and so on. We can not surely say that one of them is best. We think only the suitable approach is the best approach. Those truly successful cases all base on taking appropriate action according to the actual situation, for example, different crops, pests, pesticide, bactericide and natural enemy.
      Pesticide and natural enemy is not a pair of contradictions, if you can use them well, you can gain more. As you know that natural enemy will not control large populations of pest that are already established, nor reduce existing leaf damage. In this case, registered pesticides may be used to reduce populations of pest initially. The short residual activity pesticides are always recommended, because its residues on the leaf surface decline rapidly, and predators may be introduced a few days after application.
     When you are going to introduce natural enemy into your corps, please read carefully the side effects in this website. We always recommend you use those pesticides which only kill less 25% of natural enemy, either before or after introducing natural enemy. Those selective pesticide are necessary, due to they are safe to natural enemy and high toxic to pest. Thus it can form the basis for minimum requirement of pesticides during the growing period, and pests are not likely to develop their resistance. Of cause, those high toxic or long residual activity pesticides can be sprayed only when pests had infested your crops.
     If used natural enemies correctly, they may slow or stop the further development of damage on lightly infested plants, and slow or prevent the spread of the infestation to neighbouring plants. So always use natural enemies as early as possible to prevent damage occurring.
     Specialist predator, such as Phytoseiulus persimilis only prey on spider mites, can control spider mites rapidly. If spider mites had infested your crops, it is a best choice. Whereas, it is because of that it is a specialist predatory mite, the predatory mites can not easily maintain its population. When its exclusive food (spider mites) is insufficiency, this predator will die as soon as, then spider mites will gain an opportunity again, and you have to introduce predators again.
     Generalist predatory mites, such as Amblyseius californicus, can prey on spider mites, pollen and other small insects. This predator can also control the population of spider mites base on a lot of practices, similar to Phytoseiulus persimilis. But this predator have more advantages, it can easily maintain its population in the field, due to it can prey on pollen, some kind of larva thrips, broad mite and so on. Specially, it can survive over 2 weeks even on food. So it can constantly control the population of spider mites.
      So, when pest lightly injures your crops, the generalist predators and preventive measure are best choice. In addition, yellow or blue board can be use to trap adult whitefly, thrips and aphid, due to most predator can not capture winged pests.


       
       
          
          Yellow board trap                                Blue board trap

 

Yellow and blue board in greenhouse

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