Bioactivity ofPiper guineenseSchum. & Thonn seed andMoringa oleiferaLam. leaf powder againstTrogoderma granariumEverts (Coleoptera: Dermestidae)

Abstract

Laboratory studies were carried out to investigate bioactivity of Piper guineense seeds and Moringa oleifera leaf powders applied singly or in a mixture against larvae and adult Trogoderma granarium Everts in airtight containers. Three levels (0.0 g, 0.5 g, and 1.0 g/20 g groundnut seeds) of the plant powders were used and pirimiphos-methyl was applied at 0.01 g/20 g seeds (recommended dose). Another control consisting of untreated seeds with aerated lids was included in the bioassay. Both larvae and adults were not killed in control with aerated lids throughout the experimental period and larvae were also tolerant to airtight storage conditions. Adults were more susceptible to plant powders than larvae and adult mortality recorded in P. guineense at 1.0 g, 0.5 g and M. oleifera at 1.0 g/20 g seeds were not significantly different from the mortality observed with the recommended dose of Pirimiphos methyl at five days after treatment (DAT). Larval mortality observed in a mixture of both plants (1:1; w/w) caused significantly higher mortality (77.5%) than other treatments at 5 DAT. All treatments (P. guineense and M. oleifera applied singly or in a mixture) were repellant to larvae T. granarium with 60% repellency recorded in the mixture of plants, 50% repellency in P. guineense and 30% repellency in M. oleifera slurry. The water absorption capacity of treated seeds was not affected by treatment with plant powders and ranged from 31.98% to 37.59%.

Plant powders protect stored wheat from infestation by lesser grain borer Rhyzopertha dominica (fabricius) (Bostrichidae: Coleoptera)

“…This finding agrees with that of Ogendo et al (2004) who reported more than 50% induced mortality by Tephrosia vogelii extracts on Sitophilus zeamais. Similar finding was also reported by Babarinde et al (2001) that leaf and seeds powders of Piper guineense and Moringa oleifera were effective showed effective bioactivity against Trogoderma granarium. Adebayo ( 2003) also reported insecticidal activity of botanical insecticides in the control of insect pests of okra and cowpea.…”

BIOEFFICACY OF Moringa oleifera AND Anacardium occidentale AGAINST INSECT PESTS OF WATERMELON (Citrullus lanatus Thumb) AND THEIR EFFECTS ON FATTY ACID PROFILE

“…It is a good source of nectar used by the honey bees for production of honey (Babarinde, 2009). Its insecticidal potentials against many insect pests have been reported by several authors (Babarinde et al, 2011;Ashfaq and Ashfaq, 2012;Santos et al, 2018). Cashew nut shell liquid (CNSL) contains a high proportion of phenolic compound, Anarcadic acid and Cardole (Oparaeke et al, 2005;Olotuah and Ofuya, 2010;Mukhopadyay et al,2010).…”

Comparative Toxicity of Aqueous Extract of Tephrosia Vogelii and Some Synthetic Insecticides in the Control of Insect Pests of Cucumber (Cucumis sativus L.)

“…Extracts of spice and other medicinal higher plants have been reported to exhibit appreciable levels of insect killing activities (Amuji et al, 2012). Many workers have reported that extracts of T. vogelii exhibited strong insecticidal activity against several insect pests of agricultural crops (Adebayo 2003;Babarinde et al, 2001). According to Koona and Dorn (2005), powdered hexane extracts of dried leaves of T. vogelii effectively protected legumes seeds in storage against attacks from bruchids and reduced the damage caused by Callosobrunchus maculatus.…”