stems show long, dark brown streaks. The vascular tissue in the tubers becomes grey-brown and the tuber eyes also turn grey-brown. This disease can be…
later pale pinkish white, with a brown head and a pale anal plate. The pupa is 8-10 mm long and yellowish brown to dark brown, with several…
abaxial (underside of) leaf surfaces and may enlarge into dark brown lesions with a light brown centre. As with powdery mildew infection, pepper…
lycopersici Brown root rot, corky root rot General Pyrenochaeta lycopersici is a fungal plant pathogen, infecting tomatoes and aubergine. It causes br…
Symptoms Leaf spots are characteristically greyish brown, circular with small to large grey centres and dark brown margins. The spots may enlarge to 1…
night. The forewings are grey-brown suffused with a dark brown or black. The head and thorax are brown and the abdomen grey-brown. The forewings have…
They are at first a shiny yellowish white, with their colour changing to brown just before the larvae emerge. The cotton bollworm (Helicoverpa…
though skinned. They are up to 25 mm long and usually shiny yellowish brown or light brown with a darker head. Larval development takes 4 to 5 years.…
they are more elongated. The lesions are light brown, sunken and surrounded by a dark brown to red-brown border. The first infection is often on the…
Alternaria solani causes small green to dark brown spots to occur on leaves. Those spots then turn into dark brown angular lesions with a yellow halo…
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