Effect of Dennettia Tripetala Powder and Reduced Rates of Pirimiphos-Methyl Singly and Combined in Management of Callosobruchus Maculatus (F.) [Coleoptera: Bruchidae]

Abstract

Dennettia tripetala powder and reduced rates of pirimiphos-methyl dust were tested on cowpea against C. maculatus for their effective management. The study was conducted under ambient conditions of 25 0 C -28 0 C and 65% -75% relative humidity in the laboratory for a period of 3 months. Powder of D. tripetala and dust of pirimiphos-methyl were tested sole at 0.4g and 0.1g per 20g of cowpea seeds respectively while various combinations at 0.2g DT + 0.05g PM, 0.2g DT+ 0.025g PM, and 0.2g DT + 0.0013g PM were also tested on 20g of cowpea seed. D. tripetala powder was more effective at 0.4g when applied singly. Adult mortality of more than 80% occurred in less than 3 days. It also caused a significant reduction in oviposition, adult emergence and weight loss after emergence. Effect of sole application of pirimiphos-methyl dust at 0.1g per 20g of cowpea seed was less when compared with 0.4g of D. tripetala. The combined treatments of D. tripetala and pirimiphosmethyl slightly reduce adult emergence and weight loss. This study revealed better performance of D. tripetala powder when applied singly over reduced rates or even when combined with pirimiphos-methyl against cowpea seed beetle.

Field Response of Cowpea, Vigna unguiculata Walper to Four Insecticidal Compounds and Their Residual Toxicity to Callosobruchus maculatus (F.) [Coleoptera: Chrysomelidae] in The Laboratory

“…These observations were similar with the reports of previous works of Adebayo and Idoko (2012) and Adebayo and Eyo (2014). The effects of treatment application which caused mortality, reduced oviposition and adult emergence and weight loss have also been reported in previous studies (Ashamo, 2007;Oni, 2009;Idoko and Adebayo, 2011). The effectiveness of the insecticidal compounds on the treated seeds could indicate or suggest the presence of residue of the compounds in the seeds after harvest.…”

A Review of the Uses and Medicinal Properties of Dennettia tripetala (Pepperfruit)

“…In conclusion, Dennettia tripetala has a lot of medicinal potential that is starting to be verified scientifically. Apart from the medicinal uses, this plant can also be put to use in the field of biotechnology as scientific evidence abounds for the potential use of this plant in meat preservation [ 1 , 20 ], pest control [ 11 , 12 , 28 ], and in food supplementation and spicing [ 3 , 10 , 29 ].…”

Studies on Temperature Influence on Oviposition and Development of Immature Stages of the Yam Beetle Dinoderus Porcellus Lesne. Coleoptera: Bostrichidae on Dried Yam Species

“…The fresh yam tubers were processed and each dried yam species were pulverized into fine yam flour using mortar and pestle and sieved with sieved No. 10 to obtain fine powder while large fibrous particles were removed and discarded (Coursey, 1996: Idoko & Adebayo, 2011 and used for subsequent assays.…”