Download - Fungi
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364.T1
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Fungi
• Fungi are microscopic plants which lack chlorophyll and conductive tissue.
• They cause:
- Stem rust - Brown rot
- Corn smut - Damping off
- Powdery mildew
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364.T2
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Fungi Life Cycle
Spore Production:
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364.T3
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Bacteria
• Bacteria are microscopic single-celled organisms.
• They cause:
- Galls - Scabs
- Leaf spots - Systemic disorders
- Soft rots
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364.T4
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Bacteria Life Cycle
Division:
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364.T5
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Nematodes
• Nematodes are very small non-segmented worms.
• Nematodes cause:
- Galls on roots. - Root lesions.
- Injured root tips. - Lower yields.
- Excessive root branching. - Decreased plant health.
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364.T6
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Nematode
Excretory Pore
Spear
Esophagus
Gut orIntestine
Anus
Ovary
VulvaOvary
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364.T7
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Nematode Damage
This type of nematodefeeds and moves outside of roots throughout its life.
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364.T8
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Viruses
• Pathogenic particles which infect higher plants and animals.
• Viruses can only multiply in living cells.• Viruses cause:
– Stunting of plants.– Yellow mosaic patterns on leaves.– Flower break.– Vein clearing (chlorosis of leaves)..
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364.T9
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Virus Life Cycle
Synthesis:
(A virus needs to be inside a living cell to multiply.)
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364.T10
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Other Invertebrate Pests
Sucking Insects
Chewing Insects
Mites
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364.T11
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Damage Caused By Plant Pests
Other Invertebrates Pests (cont’d.)
Snail Slug
Centipede Millipede