Fruit

Identifying and Controlling Botrytis in High Tunnel and Greenhouse Tomato Production

Plant & Pest Advisory- May 19, 2024- Andy Wyenandt

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Botrytis, or gray mold, caused by the fungus, Botrytis cinerea, can cause significant losses in high tunnel and greenhouse tomato production if not controlled properly. The pathogen can rapidly spread during periods when structures are closed and when relative humidity remains high for long periods of time. This often occurs when outside weather remains cool […]

Phytophthora and Pythium Control During Wet Weather

Plant & Pest Advisory- May 23, 2024- Andy Wyenandt

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Most of New Jersey has been wet making current conditions ideal for pathogens such as Phytophthora and Pythium. Unfortunately, Pythium cottony leak and Phytophthora blight can be found on most farms in the southern part of the state. Poor crop rotations with susceptible hosts only make matters worse. The Phytophthora pathogen has an increasing host […]

Diagnosing Collar Rot and Alternaria Stem Rot of Tomato

Plant & Pest Advisory- May 15, 2024- Andy Wyenandt

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Collar rot (Alternaria linariae) or Alternaria stem rot (Alternaria alternata f. sp. lycopersici) of tomato are common in young tomato plants. Either can be particularly troublesome in seedlings that have been held in transplant flats for an extended period of time before transplanting in hot, humid greenhouses. Collar rot infections often start where a leaflet […]