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CAUSER AGENTS OF PLANT DISEASES

CAUSER AGENTS OF PLANT DISEASES. Abiotic Extreme temperature (high or low) Deficiency of nutrition Deficiency of oxygen over or lack of light Unsuitable acidity Toxic Mineral Air Pollution Toxic Pesticide. Biotic. Infectious disease caused by pat h ogen

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CAUSER AGENTS OF PLANT DISEASES

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  1. CAUSER AGENTS OF PLANT DISEASES • Abiotic • Extreme temperature (high or low) • Deficiency of nutrition • Deficiency of oxygen • over or lack of light • Unsuitable acidity • Toxic Mineral • Air Pollution • Toxic Pesticide

  2. Biotic • Infectious disease caused by pathogen • Pathogen: micro/macro organism (including virus) that cause the disease - Higher parasitic plant - Fungi - Bacteria - Mollicutes - Virus - Nematode - Others: Micoplasma, Spiroplasma, protozoa

  3. higher parasitic plant • Benalu (Henslowia frutescens Champ.) on water apple/rose apple (Eugenia aquea) • Tali putri (Cassytha filiformis L. or Cuscuta australis R. Br.) on an ornamental plant

  4. Pathogen the causer agent of plant disease

  5. A B b b a a Cultureable Fungi in vitro: Fusarium oxysporum f.sp, cubense, causal agent of wilt banana • Microscopic photo of Foc: a. microconidia (false head) on conidiophore, b. macroconidia on conidiophore • Colonies of Foc growing from the peace of infected tissues on acidified PDA medium: a. the peace of infected tissues, b. the colony of Foc

  6. Colonies of BDB on CPG medium. 8 days after streaking Cultureable bacterium: Blood Disease Bacteria of Banana

  7. Fimbriae (pili) Capsule Cytoplasm Ribosome Cell wall DNA Plasma membrane Flagellum Typical cell structure Chromosomal Bacterium

  8. ASSIGNMENT 1. Fungal pathogen-organism like Fungi 2. Fungal pathogen: Ascomycetes 3. Fungal pathogen: Basidiomycetes 4. Fungal pathogen: Deuteromyctes 5. Plant Bacterial Pathogen 6. Pant Virus Pathogen 7. Plant Parasitic Nematode Descript: general characters, classification, the important groups, and their examples Note: submit in form of power point

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