Fungicides are not applied to ware tubers prior to
storage for control of black scurf. Instead, fungicide treatment of seed, with
products containing pencycuron or tolclofos-methyl, has given excellent
protection of developing sprouts from both seed and soil-borne
inoculum.
However, corresponding increases in yield are rare. Tolclofos-methyl was detected in one sample in the PRC survey of salad potatoes in 1995, but
pencycuron has not been sought.
The fungicide azoxystrobin applied to the soil at planting has been shown to give effective reduction of black dot and black scurf, and it has recently been granted full approval following two seasons’ commercial use under an off-label approval (SOLA). Azoxystrobin was not looked for in the 2003 and 2004 PRC surveys. However, residues are apparently being found by industry.
However, corresponding increases in yield are rare. Tolclofos-methyl was detected in one sample in the PRC survey of salad potatoes in 1995, but
pencycuron has not been sought. The fungicide azoxystrobin applied to the soil at planting has been shown to give effective reduction of black dot and black scurf, and it has recently been granted full approval following two seasons’ commercial use under an off-label approval (SOLA). Azoxystrobin was not looked for in the 2003 and 2004 PRC surveys. However, residues are apparently being found by industry.
Yangzhou pioneer chemical CO.,LTD.
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