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Articles by K. Amevoin
Total Records ( 4 ) for K. Amevoin
  B.D. Datinon , A.I. Glitho , M. Tamo and K. Amevoin
  Many countries have understood that an alternative is needed to the problems of depletion of fossil fuels. Emphasis is therefore put on biofuel-producing crops. One of the most important biofuel-producing plants in tropical is Jatropha curcas L. Several biotic and abiotic constraints limit J. curcas production. The present survey was performed in 13 villages in Benin to assess farmers’ perceptions on the biotic constraints. These villages were located in J. curcas production supervised by the non-governmental organization “Renewable Energy Group, Environment and Solidarity”. One hundred and three producers, representing 25% of the 411 producers of the 3 sites were surveyed. Most producers were illiterate. Only 20 to 40% went to school. About 90% of producers indicated that J. curcas is damaged by pests. During the study, the pictures of the main pests reported in the literature were shown to producers. The producers recognized pests in a proportion of 34, 32 and 43% in Cove, Djidja and Zagnanado, respectively. This shows that most of them could not easily identify pests in pictures. These pests are Meloidogyne incognita (Kofoid and White) Chitwood, Phenacoccus manihoti Matile-Ferrero (Homoptera: Pseudococcidae), Aulocophora africana Lucas (Coleoptera:Chrysomelidea), Stomphastis thraustica Meyrick (Lepidoptera: Graciillariidae), Scutellera nobilis Fabricius (Heteroptera:Scutelleridae) and Pempelia morosalis Saalm Uller (Lepidoptera:Pyralidae). No local name was given to these pests, pointing at the lack of knowledge on their status as pests. Their monitoring is therefore necessary as a first step in order to develop sustainable management methods.
  A. Togola , F.E. Nwilene , E.A. Kotoklo , K. Amevoin , I.A. Glitho , O.E. Oyetunji and A. Niang
  In tropical Africa, termite damage to rice crops leads to important losses of farmers’ income. The present study aimed to evaluate the effect of rice varieties and cultural practices on termite populations and damage in the field. For this purpose, 10 rice varieties (seven NERICA, one Oryza glaberrima and two O. sativa) were cultivated in rainfed upland at Niaouli (Benin) under four cultivation practices. Termite populations and damage were evaluated during tillering, heading and maturation stages. NERICA 6, CG14 (the African O. glaberrima, parent of the NERICA), NERICA 10, NERICA 2 and NERICA 3 were the least infested and suffered least damage, while NERICA 4 and LA23 were the most susceptible. Among the cultural practices, use of Metarhizium anisopliae and regular weeding resulted in lower termite populations and less damage than other practices. Rice was most susceptible to termite attack in the period from heading to maturation. Results of this study should help rice farmers in their choice of tolerant varieties and adapted cultural practices as effective alternative measures to control termites and save rice production in the rainfed upland ecology.
  A. Togola , E.A. Kotoklo , F.E. Nwilene , K. Amevoin , I.A. Glitho , O.E. Oyetunji and P. Kiepe
  Termites are considered useful insects in natural savannah because of their role in soil fertility regulation, soil aeration and soil porosity. However, they are perceived as a serious threat for tropical agriculture. Due to the complexity of their populations and habitats, they cause high losses on dryland crops, especially upland rice. The present study aimed to analyze the specific diversity of termites on rice (Oryza) in rainfed upland conditions in Benin and to assess the damage they cause. Sampling was carried out in natural savannah and rice fields with 10 upland varieties to evaluate the population of termites. Specific damage was located on the susceptible organs of rice plants. The study allowed the identification of four termite species in the shrub savannah and six species in rice field. The commonest species on rice were Microcerotermes parvus, Microtermes sp., Pseudacanthotermes militaris and Amitermes evuncifer. Termite attack was diverse, but mainly affected roots and stems. The results of this study contributed to the identification of the diversity of termite species on rainfed upland rice and also to the identification of the damage they cause in order to undertake targeted measures against the key species.
  F. Badanaro , A. Tete-Benissan , M. Melila , K.L. Awaga , I. Bilabina , K. Amevoin and K.S. Amouzou
  Background and Objective: Several species of Coleoptera are used in diet in Togo. However, data on their nutritional value are not available. This study was undertaken to determine the nutritional value of Pachnoda marginata (Kolbe, 1906) and Rhabdotis sobrina (Gory and Percheron, 1833) of the Scarabaeidae family. Materials and Methods: After the samples of P. marginata and R. sobrina were collected, the ash, protein, vitamin and lipid contents as well as the acid, iodine and peroxide indices were determined according to the AOAC guidelines. The fiber content was obtained by the method of Weende. The minerals were analyzed by atomic absorption spectrophotometry and colorimetry. Fatty acid composition was determined by gas chromatography after separation of the methyl esters. Results: The results showed that the average protein content ranges from 48.28±0.1 to 53.89±1.00%. The lipid content is between 12.77±0.7% and 16.62±0.55%. The lipids are rich in monounsaturated fatty acids such as oleic acid (C18:1Δ9), (48.71±0.00% to 54.93±0.04%). Linoleic acid (C18: 2Δ9,12) content ranged from 1.33±0.01% to 5.45±0.01%. Linolenic acid (C18: 3Δ9,12,15) polyunsaturated fatty acid is found in R. sobrina at 1.11±0.02%. The Coleoptera studied appeared to be high in energy with calorific values of 1522.31±14.90 kj/100 g to 1681.98±15.58 kJ/100 g. The results showed that the average contents of minerals ranged from 11.59±0.41% to 13.5±0.08%. Vitamins were observed in variable amounts. Overall, P. marginata and R. sobrina are rich in vitamins, minerals, proteins and fats. Conclusion: These Coleoptera are therefore products that could contribute to food security in Togo.
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