![]() The leaf eventually dries and falls down. As the disease further develops, the spots join together into large patches killing the leaf blade as they expand. Watersoaked symptom at the leading edge of the brown patch. The infected leaf blade turns brown with the typical Infested leaf has angular watersoaked spots along its veins, margin, and tip. As the bacteria progresses, the spots turn dark-brown to black and with raised, cracked, scabby surfaces. During severe infestation, the plant drops most of its leaves leaving its fruits exposed to direct sunlight. Eventually, the spots become chocolate-brown with a paler-brown center on the lower leaf surface. Infected pepper leaf has small, circular pale-green raised spots. Severe infestation gives the plant the appearance of blight. As the bacteria further develop, the spots turn brown, slightly sunken, scabby, and sometimes surrounded by rings. Infected young fruit has small black spots. Eventually, the centre of the spots may dry and leaf may drop prematurely. ![]() The spots become angular and turn brown-black. Infected tomato leaf has dark watersoaked circular spots which are about 3 mm in sizes but may become larger In its advance stage, the lesions turn brown to grayish-white and they remain linear on the leaf margins.īacterial leaf blight of tomato and pepper Bacterial discharge appears as numerous yellow beads on the surface of the lesion. As the disease progresses, the streaks turn to yellowish-gray and transparent. Infected leaf has narrow, dark-green, watersoaked streaks of various lengths initially found on the leaf blade during tillering and booting growth stages. Bacterial discharge appears on young lesion early in the morning that looks like a milky dewdrop.Īs the disease progresses, the leaf dries-up with white lesions and the leaf blade has wavy margins. The lesions run parallel along the leaf and when they join together may cover the whole leaf. An infected boll has round watersoaked spots causing it to rot.Īn infected leaf has yellow watersoaked lesions at the margin of its leaf blade. An infected stem is girdle with black lesions (black arm syndrome) causing it to die and break. As the disease progresses, the leaf petiole and stem may become infected resulting in premature defoliation. Severe infestation leads to premature falling of leaves (defoliation). Infected leaf has angular, dark-green watersoaked spots with red to brown margin that will eventually turn dark-brown or black due to death of the infected tissues. A diseased-field shows plants with burnt appearance.īacterial blight of cotton Angular leaf spot of cotton When the infected tissue dries out, a bacterial crust is formed on the surface of the older pods lesions as a result of the drying of theīacterial discharges. Infected pod has watersoaked spots with reddish-brown edges. As the disease progresses, the spots turn brown and the leaf may fall down prematurely. Infected leaf has watersoaked spots with lemon-yellow or bright-yellow colored margins. The primary leaves have angular watersoaked spots. Infected seedling has injured growing tips. Infected seed is wrinkled and shrivelled with its hilum (the scar or eye of a bean or seed that marks its attachment to the stalk) being discolored and has a very poor germination rate. glycines)īeans, cassava, cotton, cucurbits, rice, tomato, pepper, plantain, and many other secondary host crops ![]()
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