TANDA PENYAKIT Meliputi segala struktur fisik patogen yang

Rhizomorph of Armillaria sp. • Mycellium and sclerotia of Sclerotium rolfsii on potato Uredinia

• Spores of Plasmodiophora brassicae in the host cells • Pseudothecium of Venturia

SIGN of BACTERIA • Bacterial wilt of tomato caused by Ralstonia solanacearum • Showing

• Bacterial wilt of tomato caused by Ralstonia solanacearum • showing wilting of

• Bacterial wilt of tomato caused by Ralstonia solanacearum • Brown discoloration of

• Bacterial wilt of tomato caused by Ralstonia solanacearum • Bacterial ooze from

• Bacterial wilt of tomato caused by Ralstonia solanacearum • Bacterial streaming in

Potato Brown Rot • Gray brown discoloration of vascular tissues and bacterial ooze in

SIGN of VIRUSES • Tobacco Mosaic Virus (TMV) • non-uniform coloration, with intermingled normal,

◄ Crystal composed of thousands of oriented virus particles, observed with a Freeze-Etch Replica

Pinwheel inclusion bodies formed by Soybean Mosaic Virus in soybean leaves ▼ ▲ SMV:

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TANDA PENYAKIT • Meliputi segala struktur fisik patogen yang terdapat pada tanaman sakit atau bagian tanaman yang menunjukkan gejala penyakit

SIGN of FUNGI Leaf spot on groungnut

Rust on groundnut

Rhizomorph of Armillaria sp. • Mycellium and sclerotia of Sclerotium rolfsii on potato Uredinia of Puccinia graminia f. sp. tritici; right: SEM of single uredinium of Puccinia recondita synnemata of Ophiostoma (Graphium) ulmi

• Spores of Plasmodiophora brassicae in the host cells • Pseudothecium of Venturia inaequalis

SIGN of BACTERIA • Bacterial wilt of tomato caused by Ralstonia solanacearum • Showing wilting of foliage and stunting of plant

• Bacterial wilt of tomato caused by Ralstonia solanacearum • showing wilting of foliage

• Bacterial wilt of tomato caused by Ralstonia solanacearum • Brown discoloration of stem tissues

• Bacterial wilt of tomato caused by Ralstonia solanacearum • Bacterial ooze from freshly-cut section of stem

• Bacterial wilt of tomato caused by Ralstonia solanacearum • Bacterial streaming in clear water from stem cross-section of plant

Ralstonia solanacearum

Potato Brown Rot • Gray brown discoloration of vascular tissues and bacterial ooze in potato tuber infected by Ralstonia solanacearum race 3 biovar 2

Bacterial wilt on slicing cucumbers

SIGN of VIRUSES • Tobacco Mosaic Virus (TMV) • non-uniform coloration, with intermingled normal, light green and yellowish patches, usually caused by a virus; often used interchangeably with mottle

◄ Crystal composed of thousands of oriented virus particles, observed with a Freeze-Etch Replica in a TEM. Magnified 160, 000 X ▲ C=unstained crystal A= amorphous or X body Electron micrograph of TMV: rod-shaped, with a length of 300 nm and a width of 18 nm

Pinwheel inclusion bodies formed by Soybean Mosaic Virus in soybean leaves ▼ ▲ SMV: filamentous flexuous particles about 750 nm in length HOME