1Central Potato Research Institute-Campus, Modipuram, Meerut, U.P. - 250 110
2Central Potato Research Institute, Shimla - 171 001
*Corresponding author, E-mail: vijay_paul_iari@yahoo.com
**Present address: Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi - 110 012.
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Glyphosate was tried at three concentrations for suppressing the sprout growth of potato (Solanum tuberosum L.) tubers in two cultivars differing in dormancy duration. Single pre-harvest foliar spray of glyphosate [0.833 kg (a.i.) ha−1] at 70 days after planting was effective in suppressing the sprout growth with no adverse effect on tuber number and yield. The reduction in sprout growth was 74% in Kufri Jyoti and 85% in Kufri Bahar. Higher concentrations of glyphosate resulted in abnormal sprouts with cauliflower like appearance and increased incidence of cracking in larger tubers (>75 g), especially in variety Kufri Jyoti that showed 30% of this incidence. Post-harvest application of glyphosate reduced sprout growth by 81% and 78% in Kufri Jyoti and Kufri Bahar respectively.
Glyphosate, potato, Solanum tuberosum, sprouting, sub-lethal dose, tuber, tuber cracking
