December 2014

Evaluation of the efficiency of Gaeolaelaps aculeifer in control of plant parasitic nematode Tylenchulus semipenetrans under greenhouse conditions

Biological control of plant parasitic nematode Tylenchulus semipenetrans was studied under greenhouse conditions. In the present study, the effect of the soil-dwelling predatory mite, Gaeolaelaps aculeifer (Acari: Laelapidae), on the population development of citrus nematode was examined. Compared to the nematode-alone, all mite treatments significantly restricted reproduction of citrus nematode. Nematode population...

Author(s): Aazam Salehi, Hadi Ostovan and Mohamad Modarresi

December 2014

Effect of infection by Metarhizium anisopliae isolate ICIPE 51 on developmental stage, fecundity and intrinsic rate of increase of Rhopalosiphum padi and Metopolophium dirhodum

This study assesses the pathogenicity of Metarhizium anisopliae isolate ICIPE 51 against different nymphal instars and adults of Rhopalosiphum padi and Metopolophium dirhodum and investigates effects of fungal infection on fecundity and intrinsic rate of aphid increase. To obtain different developmental stages, adult aphids were inoculated onto fresh leaf discs, reproducing parthenogenetically. Rearing was carried out...

Author(s): Patrick Murerwa, Peter Futi Arama, Alice Wanjiku Kamau and Nguya Kalemba Maniania

December 2014

Evaluation of cultivars and insecticides on insect pests and grain loss of rainfed cowpea (Vigna unguiculata (L.) Walp.) at Baga, Lake Chad shore area of Nigeria

Field trials were conducted to determine effects of cultivar and insecticide application on grain yield and yield loss of cowpea to insect pest during the 2008 and 2009 cropping seasons at Baga (13° 29ʺ N and 13° 32ʺ E), Lake Chad shore area of Nigeria. Three cowpea varieties (Kanannado, Borno brown and IT98k-1312), two insecticides [cypermethrin (30 g) + dimethoate (250 g) and neem seed aqueous extract] and...

Author(s): U. M. Maina, B. M. Sastawa and B. M. Biu