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Interactions between fish and snails in a Zimbabwe pond, with particular reference to Sargochromis codringtonii (Pisces: Cichlidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Paul Makoni MosesJ Chimbari Henry MadsenThe impact of fishes on snail densities in a 100 x 12m pond was assessed from October 2000 to May 2002, using a fish exclosure experiment. Snail species included numerically dominant Bulinus globosus (ca 85%) as well as B. tropicus,... -
Impact of Sargochromis codringtonii (Teleostei: Cichlidae) on pulmonate snails in irrigation ponds in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MosesJ Chimbari Paul Makoni Henry MadsenThe impact of Sargochromis codringtonii on pulmonate snails, including those that transmit schistosomiasis, was assessed over 29 months in 2 800m2 irrigation ponds. Snail populations in fishless ponds were first monitored for 10 months before 85 S. codringtonii were introduced... -
Seed dynamics and control of Pistia stratiotes in two aquatic systems in Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CN Kurugundla --- Department of Water Affairs, BotswanaThe fruiting and seed dynamics of the alien invasive aquatic species Pistia stratiotes L. (water lettuce; Araceae) was investigated in the seasonally flooded Selinda Canal and Zibadianja Lake of the Kwando–Linyanti River system and in the perennial Chobe River, Botswana,... -
Efficacy of fungicides, plant resistance activators and biological control agents against guava wilt disease caused by Nalanthamala psidii
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maritha H Schoeman --- Agricultural Research Council–Institute for Tropical and Subtropical Crops, South Africa Nico Labuschagne --- Department of Microbiology and Plant Pathology, South Africa Frikkie J Calitz --- Agricultural Research Council–Biometry, South AfricaGuava wilt disease (GWD) caused by the fungus Nalanthamala psidii remains a major constraint to guava production in South Africa and South-east Asia. In the current study, chemical and biological products as well as plant resistance activators were evaluated for... -
Greenhouse evaluation of Trichoderma harzianum for the control of Sclerotinia wilt (Sclerotinia sclerotiorum) of sunflower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: James R Mathews --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Benice J Sivparsad --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaSclerotinia sclerotiorum, the causal organism of Sclerotinia wilt, is an economically important disease affecting sunflower in South Africa. The goal of this investigation was to evaluate the potential of a strain of Trichoderma harzianum, T77, for control of S. sclerotiorum... -
Larvicidal activities of local Bacillus thuringiensis isolates and toxins from nematode bacterial symbionts against the Rift Valley fever vector, Aedes caspius (Diptera: Culicidae)
Item type: Journal Article • Journal: African Zoology • Authors: Ashraf M Ahmed --- , Saudi Arabia Talat A El-Kersh --- , Saudi Arabia Hamdy I Hussein --- , Saudi Arabia Tahany H Ayaad --- , Saudi Arabia Hanan A El-Sadawy --- , Egypt Mohamed S Ibrahim --- , Saudi Arabia Mikky A Amoudi --- , Saudi Arabia Ghaleb M Aseery --- , Saudi ArabiaMosquito resistance to insecticides has recently increased the burden of the majority of mosquito-borne diseases, and controlling the spread of these diseases should mainly rely on vector control measures. The present study aimed to investigate the toxicity of locally isolated... -
Potential impact of the parasitising mite, Uropoda orbicularis, as a biological control agent for the red palm weevil, Rhynchophorus ferrugineus
Item type: Journal Article • Journal: African Zoology • Authors: Mahmoud Abbas Ali --- South Valley University, Egypt Ammar Al-Farga --- University of Jeddah, Saudia Arbia Hanaa S Hussein --- Alexandria University, EgyptThe invasive red palm weevil (RPW) Rhynchophorus ferrugineus is a major pest of palms worldwide. Developing biological control methods is a priority. This study investigated the potential of the mite Uropoda orbicularis as a biocontrol agent against RPW. Uropoda orbicularis...