
Identify, understand, and prevent common plant diseases with our comprehensive visual guide. Protect your crops with science-backed diagnosis and sustainable treatment strategies tailored for every grower.
Browse all 47 diseases in our comprehensive guide
Browse our comprehensive collection of crop diseases with detailed symptoms, affected crops, and severity indicators to help you identify threats early.
Phytophthora infestans
Dark, water-soaked lesions on leaves and stems. White fungal growth on leaf undersides in humid conditions. Tubers develop brown, firm rot that spreads rapidly.
Erysiphales spp.
White powdery coating on upper leaf surfaces. Leaves may yellow, curl, and drop prematurely. Stunted growth and reduced fruit quality.
Xanthomonas campestris
Small, dark water-soaked spots that enlarge and turn necrotic. Lesions may have yellow halos. Severe infections cause leaf drop and fruit lesions.
Fusarium oxysporum
Yellowing and wilting of lower leaves, progressing upward. Vascular tissue discoloration. Plants may show one-sided wilting and eventually die.
Peronospora spp.
Yellow angular spots on upper leaf surfaces with fluffy gray-purple growth underneath. Leaves become necrotic and drop. Fruit quality severely reduced.
Puccinia spp.
Orange to reddish-brown pustules on leaf surfaces and stems. Affected leaves yellow and die prematurely. Yield losses in severe epidemics.
Colletotrichum spp.
Dark sunken lesions on fruits, leaves, and stems. Concentric rings within spots. Fruit rot and premature drop. Dieback of twigs in severe cases.
Rhizoctonia / Pythium spp.
Brown, mushy roots with reduced root mass. Plants wilt during daytime heat and fail to recover. Stunted growth, yellowing, and seedling death.
Alternaria spp.
Brown to black target-like spots with concentric rings on older leaves. Spots coalesce and leaves wither. Reduced photosynthetic area.
Tobamovirus group
Mottled light and dark green patterns on leaves. Leaf distortion and puckering. Stunted growth and reduced fruit set. Spread by aphids and mechanical contact.
Ustilago spp.
Galls or boil-like growths on ears, stalks, and tassels filled with black spore masses. Grain replaced by fungal tissue. Yield losses proportional to infection rate.
Pythium debaryanum
Seedlings collapse at soil line with water-soaked stem lesions. Roots become brown and rot. Pre-emergence rot causes patchy germination in seedbeds.
Wheat leaf rust is one of the most widespread and economically significant diseases of wheat worldwide. Caused by the fungal pathogen Puccinia triticina, it thrives in warm, humid conditions and can reduce yields by up to 40% in susceptible varieties when left untreated. The pathogen produces reddish-brown urediniospores that erupt through the leaf epidermis, creating the characteristic rust-colored pustules. Early detection and integrated management are critical, as the disease can spread rapidly across entire fields within 7–10 days under favorable conditions.
Regional Alert: Active outbreak reported in your region within the last 72 hours. Immediate inspection of wheat and barley crops is strongly recommended.
Proactive prevention is your first line of defense. Explore proven strategies organized by disease type, backed by agricultural science and field-tested results.
Stop powdery mildew, rust, and blight before they spread. Fungal pathogens thrive in humid, overcrowded conditions.
Guard against bacterial wilt, leaf spot, and canker. Bacteria enter through wounds and spread via water splash.
Prevent root rot, damping-off, and nematode damage. Poor drainage and overwatering create ideal conditions for soil pathogens.
Control mosaic virus, leaf curl, and yellow vein. Viruses are primarily spread by insect vectors like aphids and whiteflies.
Average effectiveness ratings from 2,400+ field trials worldwide
Get personalized disease identification, prevention strategies, and actionable recommendations tailored to your farm. Start your journey toward healthier harvests with ArgoNova.
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