Post on 15-Mar-2018
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
HYDROSIS (water soaked lesions)
Hydrosis of Aglaonema leaf, caused by Erwinia sp
Hydrosis of Phalaenopsis orchid leaf, caused by Burkholderia gladioli
NECROSIS caused by downy mildew (Plasmopara viticola) ► on a grape leaf
◄ Target spot (SHOT-HOLE) of tobacco, caused by Cercospora nicotianae
GUMMOSIS in a citrus tree, caused by Phytophthora cithrophthora
▼• RESINOSIS on a conifer with
Armillaria infection▼
zonate CANKER on apple, caused by Nectria galligena
▼ BLEEDING CANKER on oak with sudden death disease (Phytophthora ramorum)
▼
◄ White RUST caused by Oomycetes in the genus Albugo (Albugo candida on a brassica leaf)
◄ RUST on groundnut, caused by Puccinia arachidis