Author(s):
Swathi Shetty Y, Sanath Kumar VB, Kiran Kumar N, Ashoka KR and Chandrappa
Abstract:
Among the seven bio agents evaluated in the experiment by following dual culture technique
T. viride (72.59%)
exhibited highest mycelial inhibition, followed by
T. asperellum (70.37%),
T. harzianum (64.81%),
Ampelomyces quisqualis (63.33%), antagonistic bacteria
Bacillus subtilis (9.63%),
P. fluorescens (6.67%) whereas, least inhibition was observed by
Bacillus pumilis (4.44%). Poison food technique was followed with seven plant extracts to test their efficacy against papaya black spot (
A. caricae). Excellent mycelial growth inhibition was observed by
Allium sativum (27.93%)
which was significantly higher than all other treatments, which was followed by
Zingiber officinale (24.15%)
. Next best inhibition was imparted by
Vinca rosea (1.77%) but which was much less effective as compared to
Allium sativum and
Zingiber officinalis. Little inhibition was imposed by
Tinospora cordifolia (1.47%)
, Azardiracta indica (1.12%),
Tagetes erecta (1.07%)
and Seaweed extract (0.67%) which were on par with each other.