Tipe NEKROTIS

1
Tipe NEKROTIS

• Meliputi gejala yg muncul sbg akibat kematian
  sel-sel secara cepat, yg akhirnya dpt pula
  menyebabkan kematian jaringan, organ, bahkan
  tanaman secara keseluruhan

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HYDROSIS (water soaked lesions)
Hydrosis of Aglaonema leaf, caused by Erwinia sp
Hydrosis of Phalaenopsis orchid leaf, caused by
Burkholderia gladioli
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Phalaenopsis bacterial leaf BLIGHT, caused by
Burkholderia gladioli
4
Late BLIGHT on tomato, caused by Phytophthora
infestans
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Guava algal leaf SPOT, caused by Cepaleuros?

• ?
• Leaf BLOTCH on grape, caused by Briosia
  ampelophaga

6
NECROSIS caused by downy mildew (Plasmopara
viticola) ? on a grape leaf

• ? Target spot (SHOT-HOLE) of tobacco, caused by
  Cercospora nicotianae

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SOFT ROT of melon, caused by Pectobacterium
(Erwinia) carotovora subsp. carotovora
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Potato SOFT ROT caused by Erwinia carotovora (1)
and potato Fusarium DRY ROT (2)
1
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GUMMOSIS in a citrus tree, caused by Phytophthora
cithrophthora?

• RESINOSIS on a conifer with Armillaria infection
• ?

10
zonate CANKER on apple, caused by Nectria
galligena?

• BLEEDING CANKER on oak with sudden death disease
  (Phytophthora ramorum)
• ?

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Bacterial WILT disease of melon, caused by
Erwinia tracheiphila
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• Tomatto WILT, caused by Ralstonia solanacearum

13
DIE BACK Duch Elm Disease (Ceratocystis ulmi)
and the insect vector (Scolytus multistriatus)
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• ? White RUST caused by Oomycetes in the genus
  Albugo (Albugo candida on a brassica leaf)
• ? RUST on groundnut, caused by Puccinia arachidis

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ANTHRACNOSE on mango, caused by Glomerella
cingulata (anamorph Colletotrichum
gloeosporioides)
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ANTRAKNOSE on avocado, caused by Colletotrichum
gloeosporioides
17
DAMPING OFF on soybean seedling
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