Category Archives: Cotton Pest
Semiloopers
Semiloopers
Fig 1:Semiloopers.
Fig 2:Semiloopers.
Pest information
Semiloopers(Anomis flava)
Symptoms of damage
Defoliation. LARVA.
Description of pest
Larva: Green coloured semi-looper, with five white longtitudinal lines and red prolegs.
Leaf perforator
Leaf perforator
Fig 1:Leaf perforator.
Fig 2:Leaf perforator.
Pest information
Leaf perforator (Bucculatix loxoptila)
Bucculatricidae: Lepidoptera
Symptoms of damage
Leaf mining (by early instar), leaf perforation and skeletonization by late instar. LARVA.
Description of pest
Larva: Greenish grey covered with black spots and white warts, spins horse shoe shaped protective covering; Adult: Brownish moth.
Leaf roller
Leaf roller
Fig 1:Pupa of Leaf roller.
Fig 2:Leaf roller and rolled leaf.
Pest information
Leaf roller (Sylepta derogate)
Pyraustidae: Lepidoptera
Symptoms of damage
Leaves rolled in the form of trumpets fastened by silken threads. Marginal portions of leaves eaten away. Plants defoliated in severe attack. LARVA
Description of pest
Larva: Bright green larva (glistening) with dark head and prothoraic shield. Adult: Moth with yellow wings having brown wavy markings.
Tailed (Striped) mealybug
Tailed (Striped) mealybug
Fig 1:Cotton stem weevil.
Fig 2:Tailed (Striped) mealybug.
Pest information
Tailed (Striped) mealybug (Ferrisia virgata)
Pseudococcidae: Hemiptera
Symptoms of damage
Yellowing of leaves in older plants; under surface of leaves and terminal shoot covered with white mealy mass. NYMPH & ADULT
Description of pest
Female bug: Apterous with long prominent filaments on the posterior end and a number of hairs over the body covered with waxy powder.
Yellow star scale
Yellow star scale
Pest information
Yellow star scale(Cerococcus hibisci)
Asterolecaniidae: Hemiptera
Symptoms of damage
Yellowing of leaves in isolated plants. Scales on twigs, shoots, and leaves with sooty mould. NYMPH & ADULT.
Description of pest
Yellow star like an appearance on the leaves and stem.
White scale
White scale
Fig 1:Cotton pulvinaria.
Fig 2:cotton white scale.
Pest information
White scale (Pulvinaria maxima)
Coccidae: Hemiptera
Symptoms of damage
Yellowing of leaves in isolated plants. Scales on twigs, shoots, and leaves with sooty mould.NYMPH & ADULT.
Description of pest
Adult: Oval and convex, young scales pale.
Black scale
Black scale
Fig 1:Black scale.
Fig 2:Black scale.
Pest information
Black scale (Parasaissetia nigra)
Symptoms of damage
Yellowing of leaves in isolated plants. Scales on twigs, shoots, and leaves with sooty mould.NYMPH & ADULT.
Description of pest
Adult: Oval and convex, young scales pale.
Dusky cotton bug
Dusky cotton bug
Fig 1:Dusky cotton bug.
Fig 2:Eggs of Dusky cotton bug.
Pest information
Dusky cotton bug(Oxycareous hyalinipennis)
Lygaediae: Hemiptera
Symptoms of damage
Suck the sap from developing seeds in open bolls and stain the lint black. Seeds discoloured and shrunken. NYMPH & ADULT
Description of pest
Adult: Dusky, greyish brown bug, with pointed head and white hyaline wings.
Red cotton bug
Red cotton bug
Fig 1:Red cotton bug.
Fig 2:Red cotton bug.
Pest information
Red cotton bug(Dysdercus cingeulatus)
Pyrrhocoridae: Hemiptera
Symptoms of damage
Red stained lint and rotting bolls. Inner boll wall with warty growth or water soaked spots young bolls abort and turn dark brown. NYMPH & ADULT
Description of pest
Nymphs and adultrs: Reddish bugs with white bands on the abdomen and black markings on the wings.
Thrips
Thrips
Fig 1:Cotton Thrips.
Pest information
Thrips(Thrips tabaci)
Symptoms of damage
Shriveling of leaves due to scrapping of epidermis and desapping; when leaves unfurl after attack on terminal buds, they will have ragged edges, damage severe in seedlings. Silvery sheen on the under surface of the leaves. NYMPH & ADULT
Description of pest
Small, slender insects or varying colour from yellow to brown with fringed wings.
TNAU Cotton database 