By now, around April or May, most of the peach blossoms from spring have withered. With the rise in temperature, various pests have gradually become active. For peach trees after the blossoms wither, what pest control measures should be taken? Let's find out.
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Aphids: After peach blossoms wither, aphids concentrate on new leaves, causing small black, red, or yellow spots on affected peach leaves. Young leaves gradually turn yellow and white, and severe infestation leads to leaf drop, weakening the tree's vigor. Control: Spray with 10% imidacloprid wettable powder at a concentration of 3000-4000 times. To enhance control effectiveness, add a little neutral detergent to the solution.
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Red Spider Mites: Mainly the hawthorn red spider mite (hawthorn leaf mite). Yellow spots appear on the leaf surface of affected leaves, which expand into patches with increasing mite infestation. Severe infestation causes leaf scorching and shedding, leading to a large number of fallen leaves, affecting tree vigor and flower bud differentiation. Control: Spray with 40% trichlorfon emulsion at a concentration of 1000-1500 times, or 15% diazinon at 2000 times, or 2000-3000 times of sulfur dimethoate for control.
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Scale Insects: Scale insects mainly gather as nymphs and adults on the main trunk and branches, piercing the bark to suck sap. Some parasitize on leaf veins, petioles, or on both sides of buds. Severe infestation results in branches covered with scale shells, small leaves, withered branch tips, and even whole trees dying. Control: Spray the entire tree with 25% acetamiprid wettable powder at a concentration of 1500-2000 times, or 5% efficient cypermethrin emulsion at 2000 times.
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Peach Twig Borers: Peach twig borers mainly damage the peach shoots during the peach's open field growth process, leading to branch breakage. Moreover, their second generation will also bore into the fruit, making it difficult to control once they enter the fruit. Control: Spray with 25% cypermethrin at 1500 times, 4.5% efficient cypermethrin emulsion at 2500 times, or 48% lambda-cyhalothrin emulsion at 1500 times during peak adult occurrence and when peach twigs are damaged and broken.
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Green Stink Bugs: Apart from sucking sap from peach tree tender leaves, causing black-brown necrotic spots and holes on the leaves, green stink bugs also damage young peach fruits, causing yellow-brown puncture spots on the fruit skin, affecting fruit quality. Control: There are 3-4 important periods for controlling green stink bugs starting from when 70% of the flowers have fallen. Recommended agents include flonicamid, bifenthrin, cypermethrin, and chlorfenapyr. Follow the instructions for safe usage concentrations.
In conclusion, pest control after peach blossoms wither must be taken seriously. Especially in some areas, peach trees have already begun to bear young fruits at this time. If they are damaged at this stage, it will undoubtedly have a certain impact on the yield.
