Credits: Biovision-Infonet Cassava mealybug Larger grain borer Birds and other vertebrate pests Striped mealybug Cassava green spider mite Red spider mites Cassava scales Grasshoppers Whiteflies Termites Storage pests
Monthly Archives: February 2020
Dehorning in Cattle
Dr.iCow’s Diary Date: 05.02.2020 Dear Dr.iCow, My cow has a problem in the horn of left with a lot of something like mucus. Tell me doctor. From: Robert Mutuma, County: Meru, Kenya. Discussion: The cow was dehorned in August 2019. Wounds usually heal well with no treatment. There are risks of complications like uncontrolled bleeding, […]
Storage Pests
Credits: Biovision-Infonet A number of beetles feed on dry cassava causing post harvest losses. In Benin Republic the most common are Dinoderus sp., Carpophilus sp., the coffee bean weevil (Araecerus fasciculatus), the lesser grain borer (Rhizopertha dominica), and more recently, the larger grain borer (Prostephanus truncatus). Infestation by these insects is heavier in the rainy season than in the dry season, […]
Grasshoppers
(Zonocerus variegatus) Credits: Biovision-Infonet Grasshoppers such as the variegated grasshopper (West to East Africa south of the Sahara), and the elegant grasshopper (Z. elegans) (Southern Africa and East Africa) are brightly coloured grasshoppers. Adults are dark green with yellow, black and orange marking on their bodies. Nymphs are black with yellow markings on the body, […]
Bees attack on cows
Dr.iCow’s Diary Date: 05.02.2020 Dear Dr.iCow, Ng’ombe akindungwa na nyuki wengi huduma ya kwanza ni gani vet akiwa hapatikani haraka? English Translation: Which first aid should I give a cow that has been stung by bees if the Vet is not available? From: Kelly, County: Meru, Kenya Discussion: Kelly’s cows were attacked by a resting […]
Cassava Scales
(Aonidomytilus albus) Credits: Biovision-Infonet It is a mussel-shaped scale with an elongated silvery-white cover and about 2-2.5 mm long. This scale may cover the stem with conspicuous white secretions, and eventually the leaves. This scale sucks from the stem and dehydrates it. The leaves of attacked plants turn pale, wilt and drop off. Severely attacked […]
Red Spider Mites
(Oligonychus gossypii and Tetranychus spp.) Credits: Biovision-Infonet Several species of red spider mites also occur on cassava, mostly on the older leaves. Adults are about 0.6 mm long. Initial symptoms are yellowish pinpricks along the main vein of mature leaves. Spider mites produce protective webbing that can be readily seen on the plant. Attacked leaves […]
Cassava Green Spider Mite
(Mononychellus tanajoa or M. progresivus) Credits: Biovision-Infonet This mite is green in colour at a young age turning yellowish as adult. Adult females attain a size of 0.8 mm. They appear as yellowish green specks to the naked eye. They occur on the lower surface of young leaves, green stems and auxiliary buds of cassava. […]
Striped Mealybug
(Ferrisia virgata) Credits: Biovision-Infonet It is a whitish mealybug with two longitudinal dark stripes, long glassy wax threads and two long tails. It attains a length of 4 mm. The stripped mealybug occurs on the underside of leaves near the petioles and on the stems. It sucks sap but does not inject any toxin into […]
Birds and other Vertebrate Pests
Credits: Biovision-Infonet Birds, rodents, monkeys, pigs and domestic animals (cattle, goat and sheep) are common vertebrate pests of cassava. Measures that help to manage damage by these pests include: What to do: Fence farms and set traps in the fence. Cover exposed roots with soil. Weed your cassava farm to discourage rodents pests. Harvest roots […]