Control of insects in plum fruit
This insect is a small Lepidoptera pest of the family Lepidoptera, and it is the most serious pest that harms plum fruit, often with a damage rate of 80% to 90%. Teardrop-shaped pectin flowed from the wormhole, and the injured fruit could not continue to develop and gradually turned purplish red and fell off. The path of the killed fruit insect is full of red insect dung, and the fellow-townsman called it "bean paste stuffing". Control methods: the key period for the control of plum heart borer is the peak period of adult and spawning of each generation and the burying period of the first generation of mature larvae. 90% trichlorfon 0.8% solution, 50% malathion 1% solution, 50% dichlorvos 0.8% solution. Before fruit drop, 50% phoxim 1%-1.5% solution was applied to the soil under the crown of Li Shu. At the end of falling flower (95% falling flower), when the small fruit has wheat grain size, spray the first time, with dichlorvos, enemy kill, quick kill, Lefuling can be sprayed every 7-10 days. From the point of view of comprehensive control, biological agents can be used for soil treatment under the canopy, such as Beauveria bassiana. The fallen fruit should be swept away after autumn to reduce the source of insects in the coming year.
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It is imperative to eradicate the gum disease of plum trees.
Plum gum disease is an important disease on the trunk of plum. When the disease is serious, it often causes dry and death, which has a great impact on the tree potential and yield. It often occurs in the warm and rainy season, especially in the south. Prevention and control measures 1. Strengthen cultivation and management. When planting plum tree, apply sufficient base fertilizer, after entering the bumper year, increase application.
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Key points of management techniques for plum cultivation in greenhouse
In order to explore the technique of early fruit and early harvest of plums cultivated in greenhouse, an experimental study was carried out from 1997 to 2000. The winter shed was fastened in the second year, and the plum 1000kg was produced in the fourth greenhouse in 2000. The output value is more than 10,000 yuan, and the mature period is about 60 days earlier than that of open field cultivation. Through the experiment, we summed up the use of greenhouse to cultivate plums.
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