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AGROTECHNOLOGY

Late Blight Symptoms on Stems

Late blight infection at the base of the stem initiated by infected seed. This symptom looks similar to blackleg (see page 87). (In humid weather, no white mycelium develops on plants infected with blackleg.) Late blight symptoms…

AGROTECHNOLOGY

Nematodes and their Impact on Soil Health

Is your soil healthy? Maintaining healthy soil is key to the success of your farm, as it helps sustain a productive environment for your crops, both today and in the future. Understanding and managing soil health is…

AGROTECHNOLOGY

Late Blight Symptoms on Leaves

Initial symptoms on leaves are light- to dark-greenwater-soaked spots. The spots are circular toirregular in shape. Small lesion viewed from the upper side of leaflet Small lesion viewed from the underside of leaflet Large lesion viewed from…

AGROTECHNOLOGY

Late Blight (Phytophthora infestans)

Late blight has the potential to be an extremely destructive disease of potatoes. The fungus attacks all parts of the plant. High moisture and night temperatures of 10–15°C and day temperatures of 10–21°C are most favourable for…

AGROTECHNOLOGY

Rhizoctonia (Rhizoctonia solani)

Pathogen. Rhizoctonia is a common seed- and soilborne fungus that survives as black resting structures called sclerotia. In the soil, the fungus can also survive as mycelium on organic debris. Planting seed potatoes infested with sclerotia increases…

AGROTECHNOLOGY

Fusarium Seed Piece Decay and Dry Rot (Fusarium spp.)

Pathogen. Several species of Fusarium are present in most soils. The fungus also survives in infected seed tubers. Fusarium causes seed piece decay, dry rot in storage and plant wilting in the field.Disease development. Most Fusarium infections…

AGROTECHNOLOGY

Seed Piece Decay

Poor stands resulting from seed piece decay can be a major problem if cool, wet weather prevails immediately after planting. Several pathogens may cause seed tubers to rot before emergence.Fusarium is the most common fungus responsible for…

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