Jujube tree

The green-lipped nymphs occur 4 to 5 generations a year in the jujube tree, with temperatures of 20°C to 30°C and relative humidity of 80% to 90%. From March to April, the wintering eggs began to hatch. The first generation of May was mainly harmful to the jujube buds in the middle and early May. The second generation of June and the middle of June were harmful to jujube flowers and young fruit. It was the most serious generation that affected jujube production. The 3rd, 4th, and 5th generations were damaged in mid-July, mid-August and mid-September. Because of its irregularity and small scale, many farmers believe that they do not constitute disasters, which have caused no attention to production, missed the timing of spraying, and caused flooding.

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