Abstract:
Four fungicides V1Z. Bavistin 50 WP (Carbendazim), Tilt 250 EC
(propiconazole), Cupravit 50 WP (Copperoxychloride) and Dithane M-45
(Mancozeb) and micronputrients (Gypsum, ZnO and Boric acid) were
evaluated against Phomopsis vexans causing Phomopsis blight and fruit rot
of eggplant. The fungicides and micronutrients applied either individually or
in combination showed significant effect in terms of percent leaf infection
(%LI), fruit infection (%FI), leaf area diseased (%LAD) and fruit area
diseased (%F AD) in comparison to control. Effect of each fungicide applied
in combination with micronutrients always showed better performance in
reducing disease incidence and disease severity than the fungicides applied
alone. Among the fungicides, Bavistin 50WP (0.1 %) proved to be effective
arresting the spore germination and mycelia growth of Phomopsis vexans
assayed in in vitro test. Reduction of leaf area diseased (%LAD) caused by
Bavistin 50 WP (0.1%) in combination with micronutrients were 58.17%,
67.37%, 78.41 % and 85.25%, respectively at pre-flowering, post-flowering,
fruiting and fruit ripening stages while Bavistin 50 WP (0.1 %) alone reduced
(% LAD) by 52.22%, 58.67%, 74.19% and 83.09%, respectively at those
stages. Similarly reduction of fruit area diseased (%FAD) caused by Bavistin
50 WP (0.10/0)in combination with micronutrients were 57.93% and 79.79%,
respectively at fruiting and fruit ripening stages while Bavistin 50WP (0.1%)
alone reduced (%FAD) by 56.93% and 76.14%, respectively at those stages.
Micronutrients had little effect against the disease but significantly better
than control.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
