Insecticidal Compound from Himatanthus drasticus Latex against Cowpea Infestation by Callosobruchus maculatus (Coleoptera: Chrysomelidae)

2021 ◽  
Author(s):  
Francimauro S. Morais ◽  
Kirley M. Canuto ◽  
Paulo R. V. Ribeiro ◽  
Alison B. Silva ◽  
Otilia D. L. Pessoa ◽  
...  
Keyword(s):  
Callosobruchus Maculatus

scholarly journals Perforation index assessment of cowpea seeds against cowpea bruchid, Callosobruchus maculatus (Fabricius) [Coleoptera: Chrysomelidae], infestation using Piper guineense

2020 ◽  
Vol 81 (1) ◽  
Author(s):  
Kayode David Ileke ◽  
Jacobs Mobolade Adesina ◽  
Luke Chinaru Nwosu ◽  
Abimbola Olagunju
Keyword(s):  
Callosobruchus Maculatus ◽  
Adult Emergence ◽  
Adult Mortality ◽  
Contact Toxicity ◽  
Toxicity Assay ◽  
Piper Guineense ◽  
Cowpea Seeds ◽  
Leaf Powder ◽  
Human Use ◽  
Seed Extracts

Abstract Background Powders and extracts of Piper guineense seeds and leaves were assessed for insecticidal activities against Callosobruchus maculatus in the laboratory at temperature and relative humidity of 29.6 °C and 75.9%, respectively. Bioactive compounds in P. guineense leaves and seeds were also investigated. The powders were tested at rates 1.0, 2.0 and 4.0 g/20 g cowpea seeds while extracts were tested at 1.0, 2.0 and 3.0%. Results Results of contact toxicity assay of the seed powder caused 100% adult mortality at 96 h post-treatment period whereas leaf powder evoked 90% adult mortality within the same period at concentration of 1.0 g/20 g cowpea seeds. Low adult emergence was observed on cowpea seeds treated with 1 g of seed powder with percentage adult emergence of 10.0% and inhibition rate (IR) of 97.5%. Beetle Perforation Index (BPI) obtained from treated cowpea seeds was significantly different (P < 0.05) from BPI of untreated seeds. Extracts of P. guineense seed were more toxic than seed powder. Piper guineense seed extract caused 87.5% adult mortality of C. maculatus while leaf extract caused 70.0% adult mortality within 24 h of infestation at concentration of 1%. Progeny development of C. maculatus was completely inhibited in cowpea treated with 2% and 3% leaf and seed extracts of P. guineense. β-Pinene was the most abundant active compound in P. guineense seed (55.6%) and leaf (48.4%). β-Phellandrene occurred 38.2% in seeds while Ocimene had the least value of 0.2% in seed and 0.5% in leaf. Conclusion The study showed that P. guineense seed powder and extracts were more effective than leaf powder and extract. Utilization of plant products as alternative to synthetic insecticides in protecting cowpea seeds against C. maculatus should be encouraged for enhanced food safety and security. Piper guineense is used as spice and medicine and interestingly safe for human use.

scholarly journals A novel cysteine proteinase inhibitor from seeds of Enterolobium contortisiliquum and its effect on Callosobruchus maculatus larvae

2021 ◽  
Vol 25 ◽  
pp. 100876
Author(s):  
Natalia N.S. Nunes ◽  
Rodrigo S. Ferreira ◽  
Leonardo F.R. de Sá ◽  
Antônia Elenir A. de Oliveira ◽  
Maria Luiza V. Oliva
Keyword(s):  
Proteinase Inhibitor ◽  
Callosobruchus Maculatus ◽  
Cysteine Proteinase ◽  
Cysteine Proteinase Inhibitor

scholarly journals Thermal Preferences of Cowpea Seed Beetles (Callosobruchus maculatus): Effects of Sex and Nuptial Gift Transfers

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 310
Author(s):  
Dariusz Krzysztof Małek ◽  
Marcin Czarnoleski
Keyword(s):  
Water Balance ◽  
Callosobruchus Maculatus ◽  
Thermal Environment ◽  
Nuptial Gift ◽  
Thermal Preference ◽  
Nuptial Gifts ◽  
Insect Performance ◽  
Evaporative Water ◽  
Thermal Preferences ◽  
Seed Beetles

The thermal environment influences insect performance, but the factors affecting insect thermal preferences are rarely studied. We studied Callosobruchus maculatus seed beetles and hypothesized that thermal preferences are influenced by water balance, with individuals with limited water reserves preferring cooler habitats to reduce evaporative water loss. Adult C. maculatus, in their flightless morph, do not consume food or water, but a copulating male provides a female with a nuptial gift of ejaculate containing nutrients and water. We hypothesized that gift recipients would prefer warmer habitats than gift donors and that both sexes would plastically adjust their thermal preferences according to the size of the transferred gift. We measured the thermal preference in each sex in individuals that were mated once or were unmated. In the mated group, we measured the sizes of the nuptial gifts and calculated proportional body mass changes in each mate during copulation. Supporting the role of water balance in thermal preference, females preferred warmer habitats than males. Nevertheless, thermal preferences in either sex were not affected by mating status or gift size. It is likely that high rates of mating and gift transfers in C. maculatus living under natural conditions promoted the evolution of constitutive sex-dependent thermal preferences.

Evaluation of Cymbopogon flexuosus and Alpinia zerumbet essential oils as biopesticides against Callosobruchus maculatus

2021 ◽  
Author(s):  
Douglas Rafael e Silva Barbosa ◽  
Rebeca Barbosa Vieira dos Santos ◽  
Flavia Mayara Pereira Santos ◽  
Pedro Justino da Silva Junior ◽  
Francisco Marques de Oliveira Neto ◽  
...  
Keyword(s):  
Essential Oils ◽  
Callosobruchus Maculatus ◽  
Cymbopogon Flexuosus ◽  
Alpinia Zerumbet

Bioactivity of Acetone and Chloroform Extracts of Xylopia aethiopica (Dunal) A. Rich Seed Against Callosobruchus maculatus Fabricius (Coleoptera: Bruchidae)

2016 ◽  
Vol 6 (5-6) ◽  
pp. 412-423 ◽  
Author(s):  
Adeyemi Oluseye Akinyemi ◽  
Samuel Adelani Babarinde ◽  
Raliat Motunrayo Oyerinde ◽  
Adesola Aderonke Aderonbi
Keyword(s):  
Callosobruchus Maculatus ◽  
Xylopia Aethiopica

Sex allocation and interactions between relatives in the bean beetle, Callosobruchus maculatus

2005 ◽  
Vol 70 (3) ◽  
pp. 282-288 ◽  
Author(s):  
Sarah E. Reece ◽  
Ruth N. Wherry ◽  
Juliette M.G. Bloor
Keyword(s):  
Sex Allocation ◽  
Callosobruchus Maculatus ◽  
Bean Beetle
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