FUW TRENDS IN SCIENCE & TECHNOLOGY JOURNAL
(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170
keywords: Cercospora, incidence, prevalence, sesame, survey
Among the foliar diseases, Cercospora leaf spot (CLS) caused by Cercospora sp. on sesame is the most important causing 22 – 53% losses. Field survey was conducted across major sesame growing areas of Taraba State in 2011 and 2012 cropping seasons.The occurrence of the disease was investigated in 120 farmers’ fields in 30 locations. Averagei ncidence (%) of the disease was obtained from four randomly selected quadrants of 1m x 1m per farm; each farm representing a replicate. Simple random sampling technique was employed in the selection of plants. The results on survey revealed that, CLS was low at 8 weeks after sowing and became more prevalent at 12 weeks after sowing. It was also revealed that the disease was seen in all the areas visited. In Takum and part of Donga Local Government which fall within derived savanna ecology, CLS incidence was 86%, while the lowest value of 81% was recorded in Ardo – kola local Government area in northern guinea savanna. The total number of locations surveyed was 10 in Northern Guinea, 10 in Southern Guinea, and 10 in Derived savannas. Derived savanna had significantly (p=0.05) highest mean disease incidence 87.66%. These were followed by Southern Guinea savanna; Northern Guinea savanna incidence (83.67; 82.58%), respectively. The present study provides an indication of incidence of cercospora leaf spot of sesame on which strategies could be derived to ameliorate them in Taraba State, Nigeria.
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