4 天之前 · Tomato late blight is caused by the oomycete pathogen Phytophthora infestans (P. infestans). The pathogen is best known for causing the devastating Irish potato famine of the 1840s, which killed over a million people, and caused another million to leave the country.

2023年6月14日 · Tomato blight (also called late blight because it occurs later in the season than “early blight”) is caused by the oomycete Phytophthora infestans, which have fungus-like qualities. This pathogen attacks tomatoes, potatoes, and other nightshade crops.

2024年6月16日 · Tomato blight, in its different forms, is a disease that attacks a plant’s leaves, stems, and even fruit. Late blight (one form of tomato blight) is caused by a fungus, Phytophthora infestans, which also affects potatoes. The fungus was responsible for …

2021年7月16日 · Late blight of tomato is a serious disease that can decimate your crop. Learn to identify it and prevent this virulent infection from affecting your plants.

Late blight is found when humid conditions coincide with mild temperatures for prolonged periods. When humidity is above 90% and the average temperature is in the range of 60° to 78°F, infection occurs in about 10 hours. If conditions are ideal for disease development, disease development is rapid and losses can be severe.

Late blight is a potentially devastating disease of tomato and potato, infecting leaves, stems, tomato fruit, and potato tubers. The disease spreads quickly in fields and can result in total crop failure if untreated. Late blight does not occur every year in Minnesota.

Initial symptoms of late blight of tomato on tomato leaves: a rapidly expanding, grayish-brown blight of leaves, petioles and stems. Blighted areas on leaves may have irregular shapes.

2023年2月20日 · Key points about late blight. Late blight (Phytophthora infestans) is the devastating water mold disease that caused the Irish potato famine in the 1840s.; The disease affects all parts of tomato and potato plants. It can become active in cool, wet weather. It rarely occurs in Maryland.

2023年9月11日 · Late blight (Phytophthora infestans) is one of the most serious fungal diseases that can affect tomatoes and potatoes. Late blight is spread from infected transplants, volunteer potato or tomato plants, and certain weeds botanically related to tomatoes.

Tomato leaf late blight lesions can be round to irregular in shape and may have a brown dry center with pale green halo when conditions are dry. Ripe tomato showing late blight symptoms of firm, sunken lesions. Some lesions are dark brown, and others are golden (above) and show rings of pathogen growth.