Research Article
Collection Records of Geotrupinae Species (Coleoptera: Scarabaeidae) in Chiapas, Mexico
Issue:
Volume 8, Issue 2, June 2024
Pages:
26-30
Received:
29 March 2024
Accepted:
16 April 2024
Published:
17 May 2024
Abstract: Knowledge of the entomofauna associated with a specific geographic region is considered of ecological, economic and social importance; for decision making in the productive processes carried out by man to obtain resources; either for the conservation of agroecosystems or for the use of natural resources. In this sense, the present work was carried out in several municipalities of the central depression of Chiapas and with specimens that are deposited in the entomological collection of the Faculty of Agronomic Sciences of the Autonomous University of Chiapas, with the purpose of ordering and determining the new collection sites for specimens of the Geotrupinae subfamily; To achieve the objective, 54 specimens of the subfamily Geotrupinae from the tribes Bolboceratini (2), Geotrupini (1) and Athyreini (3) were reviewed, obtained in sporadic collections with fluorescent light, in public lighting and by reviewing cattle excrement; In addition, the specimens deposited from the entomological Collection of the Faculty of Agronomic Sciences (CACH) were reviewed and separated, which were collected in various municipalities of the state of Chiapas. The species Bolbelasmus arcuatus, Bolbelasmus variabilis, Haplogeotrupes (Geotrupes) guatemalensis unidentatus, Neoathyreus excavatus, Neoathyreus fissicornis and Neoathyreus mexicanus were determined. It is important and necessary to carry out collection studies of specimens of the Geotrupinae subfamily in other regions of the state to determine their distribution and abundance.
Abstract: Knowledge of the entomofauna associated with a specific geographic region is considered of ecological, economic and social importance; for decision making in the productive processes carried out by man to obtain resources; either for the conservation of agroecosystems or for the use of natural resources. In this sense, the present work was carried ...
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Research Article
Impact of Plant Extracts on the Pollination Activity of Apis mellifera Linnaeus, 1758 (Hymenoptera: Apidae) on Flowers of Cowpea Variety Feekem, in Dang (Adamaoua, Cameroon)
Taïmanga
,
Moukhtar Mohammadou,
Pharaon Auguste Mbianda,
Moïse Adamou,
Ousmana Youssoufa,
Boris Fouelifack-Nintidem,
Andrea Sarah Kenne Toukem,
Odette Massah Dabole,
Oumarou Abdoul Aziz,
Abraham Tchoubou-Sale,
Abdel Kayoum Yomon,
Sedrick Junior Tsekane,
Martin Kenne*
Issue:
Volume 8, Issue 2, June 2024
Pages:
31-59
Received:
22 April 2024
Accepted:
3 May 2024
Published:
24 May 2024
Abstract: Synthetic pesticides present worldwide risks of contamination of humans, livestock and the environment due to the strong persistence and the toxic residues in fruits and vegetables. Natural biopesticides of local plant origin present low persistence and are the best alternative for the control of crop pests. In the Adamaoua region (Northern Cameroon), few studies exist concerning effects of botanical pesticides on the behavior of beneficial insects. Studies aimed to draw up a list of pollinating insects on flowers of Vigna unguiculata (L.) Walp., 1843 (Fabales: Fabaceae), in situations of treatment with botanical pesticides compared to the situation of the use of synthetic insecticide and to determine the effect of the biopesticides on the behavior of the main floricultural insects. Field investigations were carried out during two cowpea cultivation campaigns (June to September 2021 and June to October 2022) in Dang (suburb of Ngaoundere) on the effect of leaves extracts of local plant origin on the foraging behavior of Apis mellifera Linnaeus, 1758 (Hymenoptera: Apidae) and the main sap-sucking insect Aphis craccivora Koch, 1854 (Hemiptera: Aphididae). Forty-four cowpea plots of 4x3.5 m each distributed according to the randomized complete block model (four untreated plots as negative control, four plots treated with the synthetic insecticide Parastar (40EC 535/ 10/IN, 20 g/l of imidacloprid and 20 g/l of lamda-cyhalothrin) as positive control, and 36 experimental plots treated with three concentrations (10%, 20% and 30%) of aqueous leaves extract of Calotropis procera (Gentianales: Apocynaceae), Eucalyptus camaldulensis (Myrtales: Myrtaceae), and Tithonia diversifolia (Asterales: Asteraceae) respectively, made it possible to conduct four treatments: (1) flowers left to freely pollination, (2) flowers protected against pollinators, (3) flowers visited exclusively by Ap. mellifera and (4) flowers protected against insects. Among eight species (four orders, four families and seven genera) recorded on the flowers of V. unguiculata, the domestic bee Ap. mellifera was the most common and collected nectar and pollen. The control plots and those treated with 10% or 20% aqueous leaves extracts allowed the bee to carry out its activity. Plots treated with 30% extract of each plant and those treated with the synthetic insecticide Parastar, drastically altered the rhythm and speed of activity in Ap. mellifera foragers. This behavior became less coordinated and slow on treated plants. It would be wise to use 10% or 20% aqueous extracts as botanical insecticides and an alternative to the synthetic insecticide Parastar.
Abstract: Synthetic pesticides present worldwide risks of contamination of humans, livestock and the environment due to the strong persistence and the toxic residues in fruits and vegetables. Natural biopesticides of local plant origin present low persistence and are the best alternative for the control of crop pests. In the Adamaoua region (Northern Cameroo...
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