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Articles by Adeyemi Daniel Adetimehin
Total Records ( 3 ) for Adeyemi Daniel Adetimehin
  Adeyemi Daniel Adetimehin , Afure Joan Ejomah and Osariyekemwen Uyi
  Background and Objective: Several studies have empirically demonstrated the insecticidal activities of the root powder and/or extract of Chromolaena odorata (L.) King and Robinson (Asteraceae) against several insect pests, however studies on the insecticidal activity of the root powder of the plant against bedbug species are scarce. This study examined the insecticidal activity of the root powder of C. odorata against the tropical bedbug, Cimex hemipterus (F.) (Hemiptera: Cimicidae). Materials and Methods: Five unsexed adult C. hemipterus were exposed to different concentrations (0.0, 1.0, 1.5 and 2.0 g) of C. odorata root powder in the laboratory after which percentage mortality was monitored every 24 h for a period of 168 h (= 7 days). Results: Percentage bedbug mortality was observed to be independent of the duration of exposure to, but dependent on the concentrations of C. odorata root powder used. Following a 168 h exposure period, the highest concentration (2.0 g) of C. odorata root powder, accounted for the highest percentage mortality (80%) against C. hemipterus. Conclusion: This study is the first to examine the insecticidal activity of the root powder of C. odorata against C. hemipterus and it further suggests its usage in the management and control of the pest in the tropics
  Osariyekemwen Uyi , Adeyemi Daniel Adetimehin , Ekene Edwin Uyamasi and Afure Joan Ejomah
  Background and Objective: Bed bugs, C. lecturalius are small hematophagous parasitic insects that feed on man, bats, chickens and other domestic animals causing severe irritation, inflammation, anaemia and general body discomfort. Studies on the use of invasive alien plants in the control of insect pests are not uncommon. Therefore present study investigated the insecticidal activities of C. odorata and M. diplotricha leaf powders against the adults of the common bed bug, C. lectularius. Materials and Methods: Five unsexed adult C. lectularius were exposed to different concentrations (0.0, 0.5, 1.0, 1.5 and 2.0 g) of C. odorata and M. diplotricha leaf powders for 24, 48, 72, 96, 120, 144 and 168 h after which percentage mortality was calculated. Results: Mortality of C. lectularius caused by the leaf powders of C. odorata and M. diplotricha was considerably high and observed to be concentration and exposure time dependent. At the highest concentration (2.0 g), C. odorata and M. diplotricha leaf powders accounted for 72 and 71% mortality of C. lectularius, respectively following a 168 h exposure period. Conclusion: In sum, this study is the first to demonstrate the insecticidal efficacy of C. odorata and M. diplotricha leaf powders against the common bed bug, C. lectularius and further suggests their usage in the control of the pest in Nigeria and elsewhere.
  Osariyekemwen Uyi , Adeyemi Daniel Adetimehin and Ogechi Perpetual Ogu
  Background and Objectives: Although a number of studies have empirically evaluated the use of extracts from several indigenous plants against insect pests, but little is known about the use of extracts from invasive alien plants to control these noxious species. This study investigated the repellent and insecticidal activities of the root extracts of two invasive alien plants, Chromolaena odorata and Mimosa diplotricha against Macrotermes species. Materials and Methods: Four concentrations of the aqueous root extracts of the two plants were tested on the worker caste of Macrotermes species using the filter paper impregnation technique after which percentage repellency was monitored for 30 min. In a similar experimental setup mortality was monitored for 12, 24 and 36 h. Results: The highest concentration [10% (w/v)] of the root extracts of C. odorata and M. diplotricha significantly repelled 98 and 100% of Macrotermes species, respectively, following a 30 min exposure period. Mortality of Macrotermes species caused by the root extracts of C. odorata and M. diplotricha was high and observed to be concentration and exposure time dependent. The highest concentration [10% (w/v)] of C. odorata and M. diplotricha root extracts accounted for 100% mortality against Macrotermes species after a 36 h exposure period. Following a 36 h exposure period, the median lethal concentrations (LC50) of C. odorata and M. diplotricha against the termites were 1.72 and 4.12% (w/v), respectively. Conclusion: This study elucidates the repellent and insecticidal activities of the root extracts of C. odorata and M. diplotricha for the first time and suggests that the root extracts of both plants can be used for the control of Macrotermes species.
 
 
 
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