https://calcitriolchemical.com..../proof-for-variable-
We conducted a systemic examination in the scatter, transmission, and pathogenesis of SPVD. Field experiments performed over two years on ten sweet potato varieties indicated that SPVD signs initially took place recently developed top leaves, and spread from right beside distant plants in the field. The SPVD incidence had been primarily (but not only) based on the opposition regarding the varieties planted, and each variety exhibited a characteristic subset of SP
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