What are the control methods for the peach globular scale?

In recent years, the peach globular scale has occurred severely in the nectarine orchards of our town. In mild cases, tree vigor weakened and yields declined; in severe cases, there was total crop loss and even tree death. To address this, we carried out two consecutive years of pesticide screening and control, with very good results. We summarize them as follows:

1. Strengthen comprehensive fertilizer and water management measures, keep the trees vigorous, ensure ventilation and light penetration, and pay attention to protecting natural enemies.

2. Before bud break, in early to mid-March, when overwintering nymphs emerge from dormancy, their body surface wax is still sparse, so timely control can achieve good results. Choose 5-degree lime sulfur mixture; the insect mortality rate was 98.1%. You can also use 80-fold mineral oil emulsion plus a little washing powder; the insect mortality rate was above 90%. The above pesticides cause no harm to natural enemies. If the number of natural enemies is very small and there is no value in protecting them, you can use 500-fold omethoate mixed with 50-fold kerosene; the insect mortality rate was 95.3%. With 500-fold methamidophos plus a little washing powder, the insect mortality rate was 98%.

3. At the peak hatching period of peach globular scale eggs (May 18-20), spray once with 0.3-degree lime sulfur mixture; the insect mortality rate was 95%. Or use 80% dichlorvos emulsion at 1000-fold dilution; the insect mortality rate was 90.5%.