This disease is caused by a microorganism, a mycoplasma-like organism (MLO), which is spread by the 6-spotted leafhopper, aka aster leafhopper(Macrosteles quadrilineatus). The leafhoppers pick it up while sucking the sap of diseased plants. This aster disease hits in early summer and affects about 200 species of ornamentals, vegetables, and non-woody fruit plants. It’s a common disease of many annuals, […]
Yellows of cabbage is a fungal wilt disease caused by Fusarium oxysporum Please see the full article, “Fusarium Wilt“, for information on symptoms and treatment. Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Fusarium oxysporum Plants Affected infects only plants in the cabbage family (Brassicaceae): cabbage mustards cauliflower broccoli turnips radish horseradish Signs & Symptoms Whole […]
Also known as White Rust. Physical Description Google Images Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Albugo candida Lifecycle Plants Affected Plants Unaffected Geographical Range Signs & Symptoms Whole Plant Leaves Flowers Fruit Roots/Tubers How to Positively Identify Treatment Prevention & Control Cultural Controls: Habitat: […]
Quick Intro Physical Description Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Lifecycle Plants Affected cabbage Plants Unaffected Geographical Range Signs & Symptoms Whole Plant Leaves Flowers Fruit Roots/Tubers How to Positively Identify Treatment Prevention & Control Cultural Controls: Habitat: Temperature & Humidity: Mulching & Cultivation […]
Also known as Sclerotinia rot, Blossom blight,Cottony rot, Crown rot, Drop, Water soft rot, White mold. And is very similar to Onion white rot or Mouldy nose (Sclerotium cepivorum) in alliums. Physical Description Google Images Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Sclerotinia spp. Lifecycle Plants Affected cabbage celery lettuce tomato Plants Unaffected sugar beet spinach cereals Geographical Range Signs & […]
Quick Intro see also Early Blight Physical Description Google Images Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Cole Crops: Alternaria brassicae Alternaria brassicicola Almond Alternaria alternata Lifecycle Plants Affected cabbage Plants Unaffected Geographical Range Signs & Symptoms Whole Plant Leaves Flowers Fruit Roots/Tubers How to Positively Identify […]
Fusarium is a soil-borne fungus that can survive for a decade or more in dormant stages. It enters the plant through roots and invades its water distribution network, where the fungi partially or completely block the vascular tissues, usually by gum-like formations, causing wilting and eventually death of the plant. General Description Widespread fungus that affects a wide […]
Quick Intro Physical Description Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Lifecycle Plants Affected cabbage Plants Unaffected Geographical Range Signs & Symptoms Whole Plant Leaves Flowers Fruit Roots/Tubers How to Positively Identify Treatment Prevention & Control Cultural Controls: Habitat: Temperature & Humidity: Mulching & Cultivation […]
Quick Intro Physical Description Google Images Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Lifecycle Plants Affected Plants Unaffected Geographical Range Signs & Symptoms Whole Plant Leaves Flowers Fruit Roots/Tubers How to Positively Identify Treatment Prevention & Control Cultural Controls: Habitat: Temperature & Humidity: Mulching […]
Quick Intro Physical Description Google Images Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Xanthomonas campestri Lifecycle Plants Affected Plants Unaffected Geographical Range Signs & Symptoms Whole Plant Leaves Flowers Fruit Roots/Tubers How to Positively Identify Treatment Prevention & Control Cultural Controls: Habitat: Temperature & Humidity: […]