Biology & diagnosis of invertebrate pests Flashcards
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Cabbage?
Plant condition (and other pertinent info):
Signs:
Symptoms: Large holes in leaves
Specimens present: None
Preliminary diagnosis:
Snails
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Wheat
Plant condition (and other pertinent info): Stunted, chlorotic, some leaves senescing; overall poor health
Signs: None obvious
Symptoms: Chlorosis, stunted growth, some leaves senescing.
Specimens present: Many small, green aphids visible.
Preliminary diagnosis:
Russian wheat aphid
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms: Leaf discolouration - tiny yellow dots on the surface, and small brown dots on the under-side of leaves
Specimens present: Small mites with dark bands on either side of their body; only viewable under the microscope.
Preliminary diagnosis:
Two spotted spider mite
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Grape leaves
Plant condition (and other pertinent info): Healthy-looking apart from small, blistery, misshapen portions of the leaf.
Signs: None
Symptoms: Portions of the leaf surface appear blistered
Specimens present: None visible
Preliminary diagnosis:
Grape blister mites
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs: Holes in galls.
Symptoms: Swollen stems (galls)
Specimens present:
Preliminary diagnosis:
Citrus gall wasp
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Cabbage leaf
Plant condition (and other pertinent info): Healthy-looking
Signs: Small areas of leaf damage that look to result from larvae chewing (epidermis in tact) and appear clusters or as indistinct lines/trails; tiny black dots visible under dissection microscope
Symptoms: Some damaged areas have become necrotic.
Specimens present: Small brown thrips < 5 mm that look like very small green caterpillars to the naked eye, but under the dissection microscope look like little yellow shrimp with black beady eyes and their poo shoot visible through their tail.
Preliminary diagnosis:
Thrips
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs: Feeding damage that resembles a halo and/or russeting around the stem
Symptoms:
Specimens present:
Preliminary diagnosis:
Citrus thrips
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type:
Plant condition (and other pertinent info):
Signs: Honeydew, sooty mould
Symptoms:
Specimens present: Blue-ish aphids that look more like little slaters in the picture
Preliminary diagnosis:
Blue-green aphids
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Grape
Plant condition (and other pertinent info): Leaves slightly wilted and curled, but that could be due to being removed from the plant;
Signs: Feeding damage on leaves, from the underside, epidermis mostly in tact; tiny black dots (scat?), filamentous webs (parts of cocoon?)
Symptoms: Small areas of browned leaf tissue; small brown dots really close together
Specimens present: Larvae < 10 mm, most ≈ 5 mm, some are encased in thin cocoon type web, clear-yellow colour with black head.
Preliminary diagnosis:
Light brown apple moth
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Cabbage
Plant condition (and other pertinent info):
Signs: Holes in leaves, cuticle sometimes left in tact
Symptoms: None
Specimens present: Caterpillars (≈ 10 mm long, opaque, and with a black head) feeding on leaves, mostly on the underside.
Preliminary diagnosis: Leaf damage caused by caterpillars of the Diamondback Moth
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms: Retarded growth
Specimens present:
Preliminary diagnosis:
Plant type: Wheat
Plant condition (and other pertinent info):
Signs: None obvious
Symptoms: Retarded growth, chlorosis, red (or purple) streaking, leaf curling
Specimens present: Many small, green aphids visible.
Preliminary diagnosis:
Russian wheat aphid
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Grape leaves
Plant condition (and other pertinent info): Variable; some leaves are green and healthy, others are wilted, shrivelled, and covered in brown dots.
Signs: The underside of the blisters look like they are covered in white dust (initially), which turns brown/red
Symptoms: Blisters/warts on the leaves, which mostly remain green on the outer surface
Specimens present: None visible
Preliminary diagnosis:
Grape blister mites
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type:
Plant condition (and other pertinent info):
Signs: Trail underneath the cuticle (looks like a blister), generally with a dark-coloured line of waste running through the middle.
Symptoms:
Specimens present:
Preliminary diagnosis:
Leafminer
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type:
Plant condition (and other pertinent info):
Signs: Trail underneath the cuticle (looks like a blister), generally with a dark-coloured line of waste running through the middle.
Symptoms:
Specimens present:
Preliminary diagnosis:
Leafminer
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs: Feeding damage that resembles a halo and/or russeting around the stem
Symptoms:
Specimens present:
Preliminary diagnosis:
Citrus thrips
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Grape leaves
Plant condition (and other pertinent info):
Signs: On the underside of the leaves, the blisters appear as red/brown dots.
Symptoms: The leaf surface appears heavilly blistered.
Specimens present: None visible
Preliminary diagnosis:
Grape blister mites
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus fruit
Plant condition (and other pertinent info): Plant condition unknown, fruit has dark spots on it
Signs: None
Symptoms: Dark spots that look like needle bruises
Specimens present: Larvae (white, < 10 mm long, black head) on the inside of fruit; small orange and black flies
Preliminary diagnosis:
Fruit fly
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Wheat
Plant condition (and other pertinent info): Reasonably healthy (green) (from image)
Signs: None obvious
Symptoms: None obvious
Specimens present: Many small, green aphids visible.
Preliminary diagnosis:
Russian wheat aphid
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Grape
Plant condition (and other pertinent info): Leaves curled; some berries missing, rotting, or damaged.
Signs: Filamentous web-like cocoon that curls leaf over, webbing amonst berries
Symptoms: Small areas of browned leaf tissue; small brown dots really close together
Specimens present: Larvae are white/opaque with a white or tanned head and range in size like cabbage white butterfly caterpillar; pupa are brown and look like little wooden fish-heads with a mealworm tail (often found amonst berries); moths are small (≈ 12 mm) and brown/tan, often with two shades of brown.
Preliminary diagnosis:
Light brown apple moth
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms: Leaf discolouration - tiny yellow dots on the surface, and small brown dots on the under-side of leaves
Specimens present: Small mites with dark bands on either side of their body; only viewable under the microscope.
Preliminary diagnosis:
Two spotted spider mite
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type:
Plant condition (and other pertinent info):
Signs: Trail underneath the cuticle (looks like a blister), generally with a dark-coloured line of waste running through the middle.
Symptoms:
Specimens present:
Preliminary diagnosis:
Leafminer
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs:
Symptoms: Swollen stems (galls)
Specimens present:
Preliminary diagnosis:
Citrus gall wasp
Specimens present:
Preliminary diagnosis:
Specimens present: Small greyish-brown moth ≈ 12 mm long
Preliminary diagnosis:
Light brown apple moth
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present: Red dots
Preliminary diagnosis:
Red scale
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present: Raised red dots (scale)
Preliminary diagnosis:
Red scale
Plant type:
Plant condition (and other pertinent info):
Signs:
Symptoms:
Specimens present:
Preliminary diagnosis:
Plant type: Citrus
Plant condition (and other pertinent info):
Signs:
Symptoms: Swollen stems (galls)
Specimens present:
Preliminary diagnosis:
Citrus gall wasp
