Recently, the author found that many fruit farmers' fruits suddenly fell a lot, do not know the reason, I think there are several situations 1.needle bee pre-harm 2.yellow stomach fall fruit 3 yellow dragon disease tree fruit fall, to determine whether there is a needle bee harm method, 1. use needle bee stickers to hang a piece in the middle of the orchard after half an hour to observe the number of needle bees, if you stick dozens of heads to take measures, if sticking a few heads to prove less. 2, observe the fruit surface that falls on the ground to observe whether there is a wound hazard, look for juice spilled by pressing it with your hand, cut open whether there are larvae? There is a needle bee fruit
Prevention method: Physical control. 1. From August to regularly observe the insect mouth base of needle bees, once every half a month, hang a needle bee sticker at intervals of 20 meters outside the orchard, and then stick to a very small needle bee to prove that the insect mouth base is small. 2. Bottle the old pesticide with propyl bromophos on the water and hang it under the tree to drive away the needle bees. 3. The production of vegetable oil by Oulianfeng can kill mites and insects, and there is a certain refusal to avoid needle bees
Chemical control general agricultural material stores have to sell kung fu, dichlorvos, propyl bromophos and so on