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Groundnut

12 pages tagged with this crop. All crops →

Alternaria leaf disease: Alternaria arachidis and A. tenuissima

Symptom Lesions produced by A. arachidis are brown in colour and irregular in shape surrounded by yellowish halos. Symptoms produced by A. tenuissima are characterized by blighting of apical portions of leaflets which turn light to dark brown colour. In the la

Bud necrosis: Peanut bud necrosis virus (PBNV)

Symptom Chlorotic spots appear on young leaflets and necrotic rings and streaks are developed. Terminal bud necrosis occurs when temperature is relatively high. As the plant matures it becomes stunted with short internodes and proliferation of auxiliary shoots

Stem rot: Sclerotium rolfsii

Symptom Pustules appear first on the lower surface and in highly susceptible cultivars the original pustules may be surrounded by colonies of secondary pustules. Pustules may also appear on the upper surface of the leaflet. They may be formed on all aerial pla

Rust: Puccinia arachidis

Pustules appear first on the lower surface and in highly susceptible cultivars the original pustules may be surrounded by colonies of secondary pustules. Pustules may also appear on the upper surface of the leaflet. They may be formed on all aerial plant parts

Symptoms of damage:

Groundnut bud borer: Anarsia ephippias Symptoms of damage: The larva bores into the terminal buds and shoots and tip of the stem The tender leaflets emerging from central spindle will show shot-hole symptoms initially In severe infestation emerging leaflets wi

Symptoms of damage :

Gram pod borer: Helicoverpa armigera Symptoms of damage : Larvae feed on the foliage, prefers flowers and buds When tender leaf buds are eaten symmetrical holes or cuttings can be seen upon unfolding of leaflets Identification of the pest : Eggs: S pherical in

Symptoms of damag e:

Bihar hairy caterpillar: Spilosoma (Diacrisia) obliqua Symptoms of damag e: Young larvae feed gregariously mostly on the under surface of the leaves Feed on leaves and causes defoliation In severe cases only stems are left behind I dentification of the pest: E

Symptoms of damage :

Freshly harvested pods having shriveled kernels Identification of the pest : Nymph: Pinkish Adult: Dark brown bugs Management: Apply any one of the following to the soil prior to sowing in endemic areas Malathion 5 D 25 kg/ha Quinalphos 25 % EC Repeat soil app

Symptoms of damage:

Young pods showing bore holes plugged with excreta Sand particles or discoloured pulps Pods without kernal. Identification of the pest: Nymph: White in early stages and later turns brown Adult: Dark brown to black with forceps like caudal cerci and white leg j

Crop Protection :: Oil Seeds :: Pest of Groundnut

White grubs : Holotrichia consanguinea, Holotrichia serrata Symptoms of damage : The grubs feed roots and damage pods. Grubs feed on fine rootlets, resulting in pale wilted plants, dying in patches. Identification of the pest : Eggs: White, almost round. Larva

I dentification of pest:

Jewel beetle: Sphenoptera indica Symptoms of damage: Wilting of plants in patches The grub burrows into the stem close to the soil surface and kills the plant Infested fields show dead and dying plants, which when pulled up and examined grub/pupa can be seen i

Symptoms of damage :

Collect medium sized larvae of Amsacta albistriga from the field and starve them over night. Make a pure suspension of virus with the nucleus culture, in water. Dip Calotropis leaves in virus suspension, shade dry and feed them to starved larvae for 1 or 2 day