Upload
mrallah-dad-khan
View
218
Download
0
Embed Size (px)
Citation preview
Chille Insects A
Lecture To ToT trainees ( FFS) By
Mr. Allah Dad Khan Provincial Coordinator
IPM KPK MINFAL Pakistan
• Crop: ChilliScientific name:Capsicum annumFamily: Solanaceae
Chilli thrips: Scirtothrips dorsalisSymptoms of damage:
• The infested leaves develop crinkles and curl upwards
• Elongated petiole• Buds become brittle and
drop down• Early stage, infestation leads
to stunted growth and flower production, fruit set are arrested
ThripsIdentification of pest:
• Nymph: Are small, linear, easily fragile abdomen with straw yellow colour
• Adult: Fringed wings
Green peach aphid: Myzus persicae
Symptoms• of damage:• The infested plants turn
pale with sticky appearance• The leaves curled and
crinkled• Honeydew excrete -
development of sooty mould
• Stunted growth of the plant
Identification of pest:
• Nymphs: Initially are greenish, but soon turn yellowish
• Adults: yellowish green in colour
•
Nymph/ Adult
Tobacco cutworm: Spodoptera lituraSymptoms of damage:
• Newly hatched larvae scrap the green matter in the leaf
• Affected leaf looks like a papery white structure
• Later instar larvae feed by making small holes
• In severe infestations they feed voraciously on the entire lamina and petiole
Identification of pest:
• Egg: Eggs are golden yellow, laid in masses and covered by silky hairs.
• Larva: Are seen in groups, young caterpillars are light green with black head or black spots
• Adult: Are brown in colour. Forewings are brown colour with wavy white markings, hind wings are white colour with a brown patch along the margin.
Gram caterpillar: Helicoverpa armigera
Symptoms• of damage:• Early instar feeds on foliage• Grown up larvae mainly
bore into the fruits.
Identification of pest:
• Eggs: Are spherical in shape and creamy white in colour, laid singly
• Larva: Shows colour variation from greenish to brown
• Pupa: Brown in colour, occurs in soil, leaf, pod and crop debris
• Adult: Female is brownish yellow stout moth, Male is light greenish in colour with “V” shaped markings.
Yellow mite or muranai mite: Polyphagotarsonemus latus
Symptoms • of damage:Downward
curling and crinkling of leaves
• Leaves with elongated petiole
• Stunted growth
Identification of pest:
• Egg: Oval shaped eggs and white in colour
• Nymphs: white in colour• Adult: Large, oval and broad
and yellowish in colour•
Yellow Mite Infestation
Beet armywormSpodoptera exigua
Symptoms
• Singular, or closely grouped circular to irregularly shaped holes in foliage; heavy feeding by young larvae leads to skeletonized leaves; shallow, dry wounds on fruit; egg clusters of 50-150 eggs may be present on the leaves; egg clusters are covered in a whitish scale which gives the cluster a cottony or fuzzy appearance; young larvae are pale green to yellow in color while older larvae are generally darker green with a dark and light line running along the side of their body and a pink or yellow underside
• Cause• Insect
Late stage beet armyworm larva feeding on pepper leaf
Flea beetlesVarious
Symptoms
• Small holes or pits in leaves that give the foliage a characteristic “shothole” appearance; young plants and seedlings are particularly susceptible; plant growth may be reduced; if damage is severe the plant may be killed; the pest responsible for the damage is a small (1.5–3.0 mm) dark colored beetle which jumps when disturbed; the beetles are often shiny and metallic in appearance
• Cause• Insects
Flea beetles are often metallic in appearance
LeafminersLyriomyza spp.
Symptoms
• Thin, white, winding trails on leaves; heavy mining can result in white blotches on leaves and leaves dropping from the plant prematurely; early infestation can cause fruit yield to be reduced; adult leafminer is a small black and yellow fly which lays its eggs in the leaf; larave hatch and feed on leaf interior
• Cause• Insects
Leafminer trails on pepper leaves
Leafroller (Omnivorous leafroller)Platynota stultana
Symptoms
• Leaves of plant rolled and tied together with silk webbing; feeding damage to rolled leaves; defoliation of plant; silk webbing may also be present on fruits and fruits may have substantial scarring from feeding damage; larvae wriggle vigorously when disturbed and may drop from plant on a silken thread
• Cause• Insect
larvae
Spider mites (Two spotted spider mite)Tetranychus urticae
Symptoms
• Leaves stippled with yellow; leaves may appear bronzed; webbing covering leaves; mites may be visible as tiny moving dots on the webs or underside of leaves, best viewed using a hand lens; usually not spotted until there are visible symptoms on the plant; leaves turn yellow and may drop from plant
• Cause• Arachnid