Lycium barbarum aphid and its control
Chinese wolfberry aphids, also known as green honey, honey, belong to the aphid family. Cluster tender shoots, buds, green fruits and other parts, absorb juice, damaged shoots curl, growth stagnation. In serious cases, the surfaces of leaves, flowers and fruits of Chinese wolfberry are all covered by aphid secretions, affecting photosynthesis, causing early defoliation, resulting in a great reduction in yield.
Chinese wolfberry aphids occur for about 15 generations a year, overwintering with eggs in the cracks and axils of buds, hatching in late April of the following year as dry mothers, parthenogenetic birth, winged aphids appear in the second and third generations, propagate and expand in the field, the aphid density is the highest from mid-May to mid-July, and the damage peak is in June. The insect population decreased slightly in the middle and last ten days of July, and the insect population density was the lowest in August and increased in September, causing damage to autumn shoots, producing sexual aphids in the first ten days of October, mating and spawning, peak spawning in the middle of October and the last ten days of November. During the damage period, the daily average temperature was between 18 ℃ and 28 May. the higher the temperature and the less rainfall, the faster the number of aphids increased.
At the initial stage of growth, 3% carbofuran diluted 2000 times liquid spray, 24% Wanling water agent 1000-1500 times liquid spray, 40% omethoate 1000 times liquid plus 5% rifampicin 5000 times liquid spray, the control effect can be achieved.
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It is the key to protect flowers and fruits for high yield of Chinese wolfberry.
Serious flower and fruit drop is an important reason affecting the yield of Lycium barbarum. This paper introduces several effective prevention and control methods. First, foliar fertilizer spraying on the basis of good application of basic fertilizer, foliar fertilizer spraying at flowering and fruit stage can reduce flower and fruit drop. However, the effect of spraying fertilizer on preventing flower and fruit drop is also different with different types and proportion of fertilizer spraying. According to the experiment, foliar fertilizer spraying increases the fruit setting rate by 38% compared with water spraying. The effect of ternary compound fertilizer sprayed with nitrogen, phosphorus and potassium is the best, and the proportion of 1:1:1 is the best. Compared with spraying water, it reduces the drop of flowers and fruits by 55%.
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Cultivation techniques of Lycium barbarum sprouts
The tender shoots of Chinese wolfberry are pollution-free and have a unique flavor of high-quality green sprouts. It is not only delicious and nutritious, but also has the special health function of tonifying kidney and nourishing liver, so it is favored by consumers. This paper introduces its simple and easy cultivation techniques for reference. First, choose the variety. Chinese wolfberry as a suitable variety for vegetables, there are fine-leaf Chinese wolfberry and big-leaf Chinese wolfberry, these two kinds of Chinese wolfberry do not bear fruit. Second, cultivation techniques. Lycium barbarum likes cold climate. The suitable biological temperature is 20: 25 ℃ during the day, 10 ℃ at night, more than 30 ℃ and less than 10 ℃.
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