The major challenge facing the livestock sector and dairy sub-sector in particular is to satisfy the rising demand for livestock products. To meet the demand for meat and milk products, livestock productivity will need to increase significantly. Availability and access to feed resources is one of the major factors limiting livestock productivity. The problem of feeds in Rwanda include deficiency in animal feed, both in terms of quality and quantity. This arises from poor and few pastures, water shortage, poor quality of commercialized feeds and limited use of agricultural by products.
Tag: animal health
Herd health, animal welfare and managing rangeland for veterinarians and veterinary paraprofessionals in Miyo and Moyale districts, Borana, Ethiopia: Training report
Bioassay and enzymatic comparison of six entomopathogenic fungal isolates for virulence or toxicity against green peach aphids Myzus persicae
Myzus persicae is an economically important pest infecting more than 40 families of crops throughout the world. Six entomopathogenic fungal isolates, three each ofBeauveria bassiana and Verticillium lecanii, were screened for pathogenicity test against the M. persicae to select high virulent isolate with the most suitable application and to determine the role of individual enzyme in its virulence. Two treatments that is, conidial shower (190±23 conidia/mm2) and filtrate (3 ml filtrate per treatment from six days liquid broth culture of 1.0×108 conidia ml-1) were conducted for virulence or toxicity test and a comparison was made between treatments and among fungal isolates against the target pest. The percent mortality rates of filtrate at each day, after inoculation was found higher as compared to percent mortality of conidial showering.V. lecanii 3 showed highest virulence or toxicity against the target pest treated either with conidial (80.70%) or filtrate (88.36%) application while B. bassiana 70 and B. bassiana 76 showed high toxicity (77.14 and 80.86%, respectively) in filtrate application at 6th day of incubation. The aphidicial activities of the fungal isolates were evaluated by correlating the enzymes (Chitinase, protease and lipase) activities with enzymes production. On the basis of enzymatic activities, lipase was assumed to participate more in the total virulence or pathogenicity as compared to protease and chitinase while protease was assumed to participate more than chitinase. The pathogenicity test reveals the selection, effective application of most virulent isolate and the role of individual enzyme to develop an alternative control agent against M. persicae.