Shallot insects A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad

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Transcript of Shallot insects A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad

Page 1: Shallot  insects   A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad
Page 2: Shallot  insects   A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad

Onion Insects A

Lecture To ToT trainees ( FFS) By

Mr. Allah Dad Khan Provincial Coordinator

IPM KPK MINFAL Pakistan

Page 3: Shallot  insects   A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad

• Crop: OnionScientific name: Allium cepaFamily: Solanaceae 

Page 4: Shallot  insects   A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad
Page 5: Shallot  insects   A Lecture By Allah Dad Khan Provincial Coordinator IPM MINFAL Islamabad

Thrips (Onion thrips, Western flower thrips)Thrips tabaci

Frankliniella occidentalis

Symptoms

• Discolored, distorted tissue; scarring of leaves; severly infected plants may have a silvery appearance; insect is small (1.5 mm) and slender and best viewed using a hand lens; adult thrips are pale yellow to light brown and the nymphs are smaller and lighter in color

• Cause• Insect

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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 yield to be reduced; adult leafminer is a small black and yellow fly which lays its eggs in the leaf; larvae hatch and feed on leaf interior

• Cause• Insects

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Onion maggotDelia antiqua 

Symptoms

• Stunted or wilting seedlings; plant will commonly break at soil line if an attempt is made to pull it up; if infestation occurs when plants are bulbing, bulbs will be deformed and susceptable to storage rots after harvest; adult insect is a greyish fly which lays white, elongate eggs around the base of the plant; the larvae that emerge from the eggs are tiny and white and bore into the plant; mature larvae are about 1 cm (0.4 in) long with feeding hooks

• Cause• Insect

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Bulb mites Rhizoglyphus spp.Tyrophagus spp. 

Symptoms

• Stunted plant growth; reduced stand; bulbs rotting in ground or in storage; pest is a cream-white, bulbous mite <1 mm in length, which resembles a pearl with legs

• Cause• Arachnid

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Onion Fly: Delia antiqua

Symptoms• of damage:• Onion leaves get rotten, 

shredded and rolled up• Growth of onion tubers gets 

hampered, tissues get decayed and becoming unfit for marketing

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Identification of Pest:

• Egg: long whitish colour eggs are laid on the undersurface of onion near soil

• Larva: Whitish and adopous• Pupa: Pupation takes place 

in soil• Adult: Grey coloured fly

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Ear wig: Euborellia annulipes

Symptoms of damage:

• Both nymphs and aduts bore into the onion bulb and feed.

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Identification of pest:

Stages • Eggs: are laid only in the 

tender leaf• Adult: The colour of the 

insect varies from pale yellow to grey

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