Spraing

[2] Spraing like symptoms can also be caused by physiological defects or specific nutrient deficiencies, most notably Calcium.

TRV spraing vectored by free living nematodes (trichodorid) most typically occurs on light sandy soils during incidence of heavy rain or over irrigation.

These conditions are ideal for the nematodes to swim to the surface in order to feed on the tubers and subsequently cause infection.

Different potato varieties show varying levels of resistance to TRV tuber symptoms.

The resultant internal brown flecks can cause costly factory rejections for commercial growers due to loss of processed quality.