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Articles by Affery Arthur Martin
Total Records ( 2 ) for Affery Arthur Martin
  Affery Arthur Martin , Abo Kouabenan , Wonni Issa , Tuo Seydou , Kassi Fernand Martial , Camara Brahima and Kone Daouda
  Background and Objective: Cassava (Manihot esculenta Crantz) is an important crop in intertropical areas. However, it is subject to many diseases, among them the bacterial blight caused by Xanthomonas axonopodis pv. manihotis. The objective of this study was to assess the behavior of two varieties of cassava, including a traditional one (Diarrassouba) and an improved one (Bocou 1) in the area of Ferkessédougou endemic to bacterial blight and on the other hand, to test the bactericidal activity of NECO, a biological product made of essential oil extracted from Ocimum gratissimum. Materials and Methods: Eight increasing concentrations of NECO in comparison with the reference Callicuivre were used to assess the in vitro antibacterial activity and the 5 mL L–1 NECO dose was used in situ. Data were analyzed with one way ANOVA and Statistica software. Results: The results show that NECO exhibits bacterial inhibitory activity with diameters ranging from 0.34-3.46 cm. In situ, the use of NECO at 5 mL L–1 dose significantly decreases bacterial blight in the range of 74.94-59.35%, depending on the crop season. Conclusion: NECO could, therefore, be used as an alternative to synthetic products in cassava bacterial blight control.
  Ehui Kouadio Jean Nestor , Bolou Bi Antoine , Amari Ler-N`Ogn Dade Georges Elisee , Affery Arthur Martin , ABO Kouabenan and Kone Daouda
  Background and Objective: Distribution, incidence and severity of cassava anthracnose interact with environmental factors and threaten cassava cultivation in Côte d'Ivoire. Current study was aimed at analyzing physiological parameters of plants, climate variability and their interaction in response to cassava anthracnose disease during crop cycle. Materials and Methods: Study focused on the establishment of experimental plots during two agricultural season (2016-2018), according to Fisher block design with eight genotypes. Observations occurred at 1 and every 2 months after planting to assess incidence and severity. Temperature (°C), relative humidity and dew point data were collected. Data were analyzed with variance ANOVA (two way) of Statistica 7.1 software with p<0.05. Results: Cassava genotypes Bocou2 (improved) and Diarrassouba (local) were resistant and tolerant with means incidences 0 and 4.02% for means severity indexes of 0 and 0.5, respectively. All over 6 genotypes have been sensitive. Cassava genotypes phenological stages of tuberization (incidence = 14.70, severity index = 0.9) and maturation (incidence = 25.13%, severity index = 1.8) were most severely infested. Mean temperature, relative humidity and dew point variations of 8.4°C, 26% and 7.4°C, respectively, led to outbreak of first symptoms at tuberization stage. Rising temperatures and dew point levels are correlated to heavy infestation and severe deterioration of infected organs. Conclusion: Cassava genotypes behavior differs in response to anthracnose disease at tuberization and maturation stages. Physiological modifications occurred at tuberization stage conducted to infestations of sensitive genotypes. Rising temperature, relative humidity and dew point variations could support severe outbreak of cassava anthracnose disease.
 
 
 
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