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{ |
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"classes": { |
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"Healthy": 0, |
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"Gray_Leaf_Spot": 1, |
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"Blight": 2, |
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"Common_Rust": 3 |
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}, |
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"details": { |
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"Healthy": { |
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"description": "Plants show no signs of disease.", |
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"characteristics": [ |
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"Vibrant green color", |
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"Uniform leaf structure", |
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"No spots or lesions", |
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"Normal growth and development" |
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], |
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"importance": "Represents the ideal state of the crop, with maximum yield potential." |
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}, |
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"Gray_Leaf_Spot": { |
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"causative_agent": "Cercospora zeae-maydis, C. sorghi var. maydis", |
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"symptoms": [ |
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"Small, regular, elongated brown-gray necrotic spots growing parallel to the veins", |
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"Lesions may reach 3.0 x 0.3 cm", |
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"Lesions may coalesce, producing a complete burning of large areas of the leaves" |
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], |
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"environmental_conditions": [ |
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"Prevalent in subtropical and temperate, humid areas", |
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"Favored by extended periods of leaf wetness and cloudy conditions" |
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], |
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"impact": "Can result in severe leaf senescence following flowering and poor grain fill", |
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"notes": [ |
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"Also known as cercospora leaf spot", |
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"Minimum tillage practices have been associated with increased incidence" |
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] |
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}, |
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"Blight": { |
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"note": "This typically refers to Northern Corn Leaf Blight, but could include other types of blight", |
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"causative_agent": "Setosphaeria turcica (Teleomorph), Exserohilum turcicum (Anamorph)", |
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"symptoms": [ |
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"Small, oval, water-soaked spots on leaves", |
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"Spots grow into elongated, spindle-shaped necrotic lesions", |
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"Lesions may appear first on lower leaves and increase in number as the plant develops", |
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"Can lead to complete burning of the foliage" |
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], |
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"environmental_conditions": [ |
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"Occurs worldwide, particularly in areas with high humidity and moderate temperatures", |
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"Prevalent during the growing season" |
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], |
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"impact": "When infection occurs prior to and at silking and conditions are optimum, it may cause significant economic damage" |
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}, |
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"Common_Rust": { |
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"causative_agent": "Puccinia sorghi", |
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"symptoms": [ |
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"Small, elongate, powdery pustules over both surfaces of the leaves", |
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"Pustules are dark brown in early stages of infection", |
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"Later, the epidermis is ruptured and the lesions turn black as the plant matures" |
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], |
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"environmental_conditions": [ |
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"Found worldwide in subtropical, temperate, and highland environments with high humidity" |
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], |
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"impact": "Can reduce yield, especially if infection is severe before or during tasseling", |
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"notes": [ |
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"Most conspicuous when plants approach tasseling", |
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"Alternate host (Oxalis spp.) may show light orange colored pustules" |
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] |
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} |
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}, |
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"general_notes": [ |
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"Early detection and proper identification of these diseases are crucial for effective management.", |
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"Integrated pest management strategies, including resistant varieties, crop rotation, and timely fungicide applications, can help control these diseases.", |
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"Climate conditions, particularly humidity and temperature, play a significant role in the development and spread of these diseases.", |
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"Many diseases can have similar symptoms, so careful observation and sometimes laboratory analysis may be necessary for accurate diagnosis.", |
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"The severity of disease impact often depends on the timing of infection relative to the plant's growth stage.", |
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"Some pathogens can infect multiple parts of the plant, including leaves, stalks, and ears." |
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] |
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} |
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