Some preliminary notes on the effect of psyllid yellows on seed stock from infected plants
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Sufficient evidence has already been presented to show that damage to seed from psyllid infestation may occur under certain environmental conditions, and that it is dangerous to certify fields showing more than fifteen per cent of mild symptoms of psyllid yellows on second inspection. This tolerance was adopted in Colorado beginning with the season of 1934.
KeywordsAMERICAN Potato Journal Infected Seed Certified Seed Psyllid Yellow Irish Cobbler Potato
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