Control of Diaphorina citriby pouring thiamethoxam
In order to find a new method to control Diaphorina citriin the field,the experiment of controlling Diaphorina citriwith thiamethoxam was carried out on navel orange.The result showed that in mid-to-late April the control effect of single pouring 25%thiamethoxam water dispersing granule 1 500 times(the dose was 0.17 g/m2)could be as long as from 1.5 to 3.0 months in field.The pesticide residue of thiamethoxam in navel orange was 0.06 mg/kg after 28 days of applying 25%thiamethoxam water dispersing granule 1 500 times.It was far lower than the 0.5 mg/kg maximum residue limit(MRL)of thiamethoxam in citrus fruits stipulated in the national standard for food safety(GB 2763-2021).It is safe to apply 25%thiamethoxam water dispersing granule 1 500 times 1 month before harvest to control Diaphorina citri.
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