The citrus farmers have taken active actions to seize the current critical period of production, strengthen management, and prevent and treat pests such as mandarin oranges and whiteflies.
First, the degree of occurrence
Due to insufficient management of winter and spring, the pests and diseases in citrus groves are currently serious. According to field investigations and meteorological data analysis, it is estimated that citrus red spider 5, citrus powder 5, citrus scab 3, and 广Wax 3, leaf A2, thrips, etc. Grade 3 Citrus acuminatum.
Second, the main basis
According to the investigation of the Plant Protection Station, 511 orange spider mites were in the peaks of Cheng and Ruofeng; oranges were observed on April 11 and were 4 days later than last year. On May 6, the number of ovules was 311. , an increase of 12.3% over the same period of last year; citrus fruit scab disease rate of 0.6%; ? wide-winged wax larvae phyllospheric larvae 67 heads, part of the hills orchards large amount of insects; leaf A class of the amount of 23 heads; citrus tip The early stage of prevention and treatment is the best time for prevention and treatment at the beginning of May 11 and the beginning of June.
Third, the main measures
1. In mid-to-late May, it is an important period for the management of citrus, and management must pay great attention to it.
2. For young trees and no-fruit gardens, in combination with the “dense change and thinning†project, first remove the prosperous branches, improve the illumination in the crown, and suppress the occurrence of pests and diseases.
3. Immediately turn on the frequency-vibration insecticidal lamp, so that the unified contiguous open and jointly kill.
4. Promote fruit trees between the rows of trees to form a good field environment.
5, prevention and treatment time: whitefly, spider mite, scab disease, leaf warts and other control time May 19-24, Citrus aurantium control time June 5-10.
6, the main pharmaceutical formulations: 1 orange spider mites with 1.8% avermectin 3,000 times is appropriate, any large amount of insects mouth is not clear park or clear garden is not complete garden should add more than 99% of paraffin mineral oil, dilution The concentration should be 250-300 times. 2 citrus mealybugs with 25% acetamiprid or 25% buprofezin both governance thrips, waxy wax and so on. 3 The citrus scab disease was alternately replaced with 70% thiophanate-methyl and 70% tricyclazole. 4 Citrus auriculariae is dominated by 25% thiamethoxam and paraffin oil, with little or no methionine. In the use of the above pharmaceuticals, it should be reasonably formulated in accordance with the specifications. The secondary dilution method should be adopted, and no pesticide should be applied at sunny high temperature at noon to protect the young fruit and the safety of producers.
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