TITLE:
Effect of Different Sowing Dates on Disease Initiation and Development of Roselle (Hibiscus sabdariffa L.) Leaf Spot Disease Caused by Coniella musaiensis Var. hibisci in Makurdi, Central Nigeria
AUTHORS:
K. D. Apeyuan, A. O. Nwankiti, O. A. H. Oluma, E. J. Ekefan
KEYWORDS:
Accession, Sowing Date, Disease Severity, Hibiscus sabdariffa L., Yield. Coniella musaiensis Var hibisci
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.5 No.11,
November
9,
2017
ABSTRACT: The experiment was conducted
mainly to investigate the effect of change in sowing dates on disease severity
of Roselle (Hibiscus sabdariffa L)
leaf spot caused by Coniella musaiensis Var hibisci, plant height, number of branches, number of fruits and calyx yield of
Roselle (H. sabdariffa L). Five dates
were selected with an interval of fourteen days (14) between the dates for two
years (2003 and 2004) to determine the most appropriate time to sow the crop
using two Roselle accessions; green (Acc1) and red (Acc3).The first date was
determined by the establishment of the rains in the season. It was observed
that change in sowing dates had significant (p = 0.05) effect on disease severity but not on plant height,
number of branches, number of fruits and calyx yield. Plants sown on July 18/27
had lowest disease indices; and are thus the best and therefore recommended for
cropping of Roselle.