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IRRIGATION

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AGROTECHNOLOGY

Chemical Damage

Spots with bleached appearance on leaves caused by a mixture of pesticides and nutrientsapplied in hot and humid weather. Top-dressed nitrogen fertilizers often burn foliage if applied when the weather is hot and humid. This is most…

AGROTECHNOLOGY

Higher Total Canadian Potato Storage Holdings

On December 1, 2022, total Canadian potato storage holdings were somewhat higher than in 2021, but they were still 11.7% higher than the three-year average. Given the short crop in the US, demand is generally strong for…

AGROTECHNOLOGY

Air Pollution

Potato plants may be injured when exposed to high concentrations of various air pollutants. Injury can range from leaf damage to death of the plant. Severity of theinjury depends on environmental conditions, the concentration of the pollutants,…

AGROTECHNOLOGY

Northern Root-knot Nematode (Meloidogyne hapla)

Pathogen. The only root-knot nematode that has been detected on potatoes in Ontario is the northern root-knot nematode. Males are worm-like, and femalesare pear-shaped.This nematode causes small galls to develop on the roots, and lateral roots to…

AGROTECHNOLOGY

Witches’ Broom

Leafhoppers acquire the witches’ broom phytoplasma from infected legume hosts. Later, they migrate to potato fields and transmit the pathogen. Usually, infectionsoccur too late in the season for symptoms to develop.Symptoms are usually visible on plants that…

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