(Helicoverpa spp.; Spodoptera spp.) Credits: Biovision-Infonet Moths of fruitborers are active at dusk and at night, feeding on nectar and laying eggs on leaves. Caterpillars feed on leaves, flowers and fruits. Although severe leaf damage by feeding of African bollworm (Helicoverpa spp.) caterpillars may slow plant growth due to reduced leaf area, caterpillar feeding on […]
Monthly Archives: February 2020
Groundnut Information Source Links
Credits: Biovision-Infonet AIC (2002). Field Crops Technical Handbook. Nairobi Kenya. ARC/LRN. (2007). Termites in crops. Blay, E., Cudjoe, A. R., Braun, M. (eds). (2000). Handbook of crop protection recommendations in Ghana: An IPM approach Vol:1 Cereals and pulses. May 2000. Plant Protection & Regulatory Services Directorate and Integrated Crop Protection Project (ICP) German Development Co-operation (GTZ/PPRSD). Bohlen, […]
Quick Search Groundnut Diseases
Credits: Biovision-Infonet Damping-off diseases Leaf spots Rust Aspergillus crown rot Groundnut Rosette Disease Bacterial wilt
Groundnut Rosette Disease
Credits: Biovision-Infonet It consists of three types namely groundnut chlorotic rosette, groundnut green rosette and groundnut mosaic. The disease is caused by a complex of different strains of groundnut rosette umbravirus. Symptoms vary depending on strain(s) present. They include yellowing, mottling and mosaic symptoms on leaves and stunting and distortion of the shoots. Older leaves […]
Aspergillus Crown Rot
(Aspergillus niger) Credits: Biovision-Infonet The fungus causes both seed and seedling rot and drastically reduces plant stand. In moist soil, seeds may be attacked and killed due to rotting. Seeds removed from soil show black sooty cover. The infected areas of seedlings are covered with black fungal spores. Mature plants are also attacked. Symptoms include […]
Groundnut Rust
(Puccinia arachidis) Pustules (spots or blisters) can form on all aerial plant parts except flowers. Orange coloured pustules first appear on the lower surface of leaflets. Later, pustules may appear on the upper surface of the leaflets. The pustules on the stem are elongate and elevated. The pustules when mature rupture to release masses of […]
Groundnut Leaf Spots
(Cercospora spp.) Credits: Biovision-Infonet Symptoms of early leaf spot (Mycosphaerella arachidis, Cercospora arachidicola) consist of sub-circular dark brown spots produced on the upper leaflet surface. The spots are of lighter shade of brown on the lower side of the leaflets. Yellow halo is seen around the brown spots. Oval to elongate spots are also seen […]
Groundnut Damping-off Diseases
(iPythium spp., Rhizoctonia solani) Credits: Biovision-Infonet Damping-off diseases affect the initial establishment of a crop. Their main features include poor emergence and death of seedlings leading to poor stands in seedbeds and fields. Seeds may rot before germination. Affected seedlings that have emerged from the soil show water-soaking, browning and shrivelling of the stem at […]
Quick Search Groundnut Pests
Credits: Biovision-Infonet White Grubs Termites Millipedes Aphids Groundnut Hopper Thrips Groundnut Leafminer Storage Pests: Moths and Beetles Root-knot Nematodes Spider Mites
Groundnut Storage pests: moths and beetles
Credits: Biovision-Infonet Stored groundnuts are attacked by moths (Ephestia cautella, Plodia interpunctella, Cadra cautella), and beetles (Caryedon serratus, Tribolium castaneum, Trogoderma granarium). The larvae of moths and the grubs and adult beetles bore into and damage seeds. Moths cause extensive webbing. The bruchid beetle Caryedon serratus is the major pest of groundnut in pod shell […]