Leaf Roller in Cotton Crop
Cotton Insect Pests Leaf roller
Common Name :
Leaf roller
Local Name :
Pane Gundalnari ali
Scientific Name :
Sylepta derogata Fab.
Family :
Pyraustidae
Order :
Lepidoptera
Pest Category: Foliage feeder
Leaf Roller Live Video : https://www.agritechguru.com/2019/12/Cotton-Leaf-Roller.html
Distribution and status:Africa, Australia, Burma, Sri Lanka, Japan, Java & China. Minor pest.
Host range:
Cotton, Bhendi, Abutilon Indicum, and other malvaceous plants.
Description of Insect Stages:
![Cotton Leaf Roller Life Cycle Cotton Leaf roller, Leaf Roller on Cotton, Cotton Leaf Roller Life Cycle, Leaf Roller on Cotton Crop, Leaf roller, Pane Gundalnari ali, Sylepta derogata , Cotton Insect Pests Leaf roller](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEga7HtqhoDb2v7hyphenhyphenIht-aaBkn10xuqr9SmP6eKC6eou0Y0gCjm9fDDOQ_cZRMsqXESLNlAYUI44ZM7xrnBUFzAaVWDQVpiE7A8W0f78zs4HLOkBOdU0twbTYaBNhA2x6LJ6b1pNmRUdkKVF/s1600/Cotton-Leaf-Roller-Life-Cycle.png)
Cotton Leaf Roller Life Cycle
![Cotton Leaf Roller Life Cycle Cotton Leaf roller, Leaf Roller on Cotton, Cotton Leaf Roller Life Cycle, Leaf Roller on Cotton Crop, Leaf roller, Pane Gundalnari ali, Sylepta derogata , Cotton Insect Pests Leaf roller](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEga7HtqhoDb2v7hyphenhyphenIht-aaBkn10xuqr9SmP6eKC6eou0Y0gCjm9fDDOQ_cZRMsqXESLNlAYUI44ZM7xrnBUFzAaVWDQVpiE7A8W0f78zs4HLOkBOdU0twbTYaBNhA2x6LJ6b1pNmRUdkKVF/s1600/Cotton-Leaf-Roller-Life-Cycle.png)
Egg:
an egg is a round, smooth and pale white in color.Larva:
![Cotton Leaf Roller Egg Stage in Cotton Cotton Leaf Roller Egg Stage in Cotton, Cotton Leaf roller, Leaf Roller on Cotton, Cotton Leaf Roller Life Cycle, Leaf Roller on Cotton Crop, Leaf roller, Pane Gundalnari ali, Sylepta derogata , Cotton Insect Pests Leaf roller](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJ24J3hSYNKNybbs1F9fT70_5w9LLe9AYVxATx-mip-TGhL6johabF1xke-W0mJox-XvIqrs1lAJrwy8qvX9_1003LUNTzaUPXhx17SV1ju2Geaa01jln3DAp-4GiSZ0NpcicjACjiB4Hq/s1600/Cotton-Leaf-Roller-Egg-Stage-in-Cotton.jpg)
Cotton Leaf Roller Egg Stage in Cotton
The larva is glistening green in color and semi-translucent with a dark brown head. They become pinkish before pupation. Fully-grown larva measures up to 22-30 mm. Bright green (glistening) with a dark head and prothoracic shield![Cotton Leaf Roller Egg Stage in Cotton Cotton Leaf Roller Egg Stage in Cotton, Cotton Leaf roller, Leaf Roller on Cotton, Cotton Leaf Roller Life Cycle, Leaf Roller on Cotton Crop, Leaf roller, Pane Gundalnari ali, Sylepta derogata , Cotton Insect Pests Leaf roller](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJ24J3hSYNKNybbs1F9fT70_5w9LLe9AYVxATx-mip-TGhL6johabF1xke-W0mJox-XvIqrs1lAJrwy8qvX9_1003LUNTzaUPXhx17SV1ju2Geaa01jln3DAp-4GiSZ0NpcicjACjiB4Hq/s1600/Cotton-Leaf-Roller-Egg-Stage-in-Cotton.jpg)
Pupa:
The pupa is reddish-brown in color and typical in having eight spines with Hooked tip at their extremity.Adult:
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Cotton Leaf Roller in Larva Stage in Cotton |
Bionomics:
Egg period: 2-4days, green round. 250-300 eggs/female laid on the ventral surface of the leaves. Larva:2- 3 weeks, glistening green with a dark head. Pupa: 6-12 days. Pupates within the roll or ground or fallen leaf. The adult is a medium-sized cream-colored moth with wavy markings.
Nature of Damage:
![Cotton Leaf Roller in Larva Stage Cotton Leaf Roller in Larva Stage in Cotton, Cotton Leaf roller, Leaf Roller on Cotton, Cotton Leaf Roller Life Cycle, Leaf Roller on Cotton Crop, Leaf roller, Pane Gundalnari ali, Sylepta derogata , Cotton Insect Pests Leaf roller](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxNb1K-P17xPhQSn4m9OohlRCASzmLi_2JErSkA-sFcLojnDvcSWoUUAnXqnY3QUt90rnBFQpgEoLwFAt9MoO5HV99VXgDXHatABE2xfzlN0EUyCA8f4Zxojr5ZQizFeNMDBpPdjGlZTIs/s1600/Cotton-Leaf-Roller-in-Larva-Stage.jpg)
Cotton Leaf Roller in Larva Stage
![Cotton Leaf Roller in Larva Stage Cotton Leaf Roller in Larva Stage in Cotton, Cotton Leaf roller, Leaf Roller on Cotton, Cotton Leaf Roller Life Cycle, Leaf Roller on Cotton Crop, Leaf roller, Pane Gundalnari ali, Sylepta derogata , Cotton Insect Pests Leaf roller](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxNb1K-P17xPhQSn4m9OohlRCASzmLi_2JErSkA-sFcLojnDvcSWoUUAnXqnY3QUt90rnBFQpgEoLwFAt9MoO5HV99VXgDXHatABE2xfzlN0EUyCA8f4Zxojr5ZQizFeNMDBpPdjGlZTIs/s1600/Cotton-Leaf-Roller-in-Larva-Stage.jpg)
Cotton Leaf Roller in Larva Stage |
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Cotton Leaf Roller in Larva Stage |
Symptoms:
Leaves are folded downwards individually or in groups, and larvae are seen in groups amidst fecal materials inside the fold. Leaves at the bottom of the crop canopy show symptoms at low infestation levels. Defoliation of the whole plant is seen under severe infestations. The infestation spreads to neighboring plants and hence the symptoms of the pest are patchy. The plants under shades along the field borders are more vulnerable to the attack by the pest.
Life History:
Eggs are laid singly on the undersurface of the leaves along the midrib and bigger veins. The moth lays as many as 200 eggs. The egg, larval and pupal periods occupy 2-3, 15-18 and 7-8 days, respectively. The larva molts six times before pupation. Pupation takes place mostly on the plants, inside the rolled leaves and sometimes on the shed leaves on the ground. The life cycle is completed in 23-53 days.Seasonal Dynamics:
Managment :
- Collection and destruction of shredded plant parts
- Hand-picking and destruction of grown-up caterpillars
- Spray any one of the following insecticides
- chlorpyriphos 20 EC 2.0 l/ha
- dichlorvos 76 WSC 1.0 l/ha
- Spray carbaryl 50 WP 2 Kg or phasolone 2.5 L in 1000 L of water/ha.
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Cotton Leaf Rollerin Adult Stage |
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