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These bees destroy tomato heliotis worms in tomato fields and control corn stem borers in corn fields. In addition, they strongly control the pea heliotis population in pea fields.
How to release the bumblebees:
Depending on the density of the pest population, at the peak of the larval population, 2 stages of release are carried out, and in each stage, 1000 to 2000 bumblebees are released per hectare.