Prevention and control method for yellowing disease of pear trees

Abstract

The invention discloses a prevention and control method for a yellowing disease of pear trees. The yellowing disease of the pear trees is prevented and controlled by applying a compound fertilizer toa pear orchard, wherein the compound fertilizer comprises an organic fertilizer, cotton slag (withered grass or oil cakes), a biological bacterial fertilizer, chelated iron and brown sugar; and the method for applying the compound fertilizer comprises the following steps: (1) performing stack composting fermentation on the compound fertilizer; (2) ditching a dressing furrow with a depth of 40 cm and a width of 20 cm in a water dripping line of one side of each row of the pear trees; (3) applying the compound fertilizer to the dressing furrows according to the following ratio per mu: 3-4 m<3> of the organic fertilizer, 6-8 m<3> of the cotton slag, 80-100 kg of the agricultural biological bacterial fertilizer, 15-18 kg of the chelated iron, and 8-11 kg of the brown sugar; and (4) in a nest year, spraying a chelated iron dilution solution in the leaf expansion stage of the fruit trees, wherein spraying is performed once every 7 days, and spraying is performed for 2 to 3 times. The prevention and control method for the yellowing disease of the pear trees provided by the invention can significantly reduce the disease incidence rate of the yellowing disease, and promote transformation ofa severe yellowing orchard to a moderately and slightly yellowed orchard; and no recurrence of a slightly yellowed in a second year can be guaranteed through the technology.

Description

technical field

[0001] The invention relates to the technical field of plant protection, in particular to a method for preventing and treating yellowing disease of pear trees. Background technique

[0002] Korla fragrant pear is a well-known "famous, excellent and special" fruit in Xinjiang, which plays an important role in earning foreign exchange from export, increasing agricultural efficiency, and increasing the income of fruit farmers. By the end of 2016, the planting area of ​​fragrant pears reached 1.0949 million mu, with a total output of 1.046 million tons. It is one of the pillar industries of Xinjiang characteristic forest and fruit industry. Fragrant pear is a perennial crop. It grows in a fixed position for a long time and can only absorb nutrients in the soil space of the root system, which is more likely to cause the lack of certain nutrients in the soil. Continued deterioration, soil compaction, soil aeration and water permeability deteriorated, the Korla fr...

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