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Efficacy of Different New Fungicides in Controlling Sigatoka Disease of Banana

M. N. Islam
Plant Pathology Division, BARI, Gazipur

Abstract/ Executive Summary:

The experiment was conducted at RARS, Burirhat, Rangpur during 2018-2019 cropping season to evaluate the efficacy of thirteen new fungicides viz. Techvo 75WG, Forever 75WG, Dragon 75WP, Safa 30 SC, Paladin 40SC, Tricofol 75WP, Blasto 75WG, Trigger 75WP, Farm zeb 80 WP, SR Top 32.5 SC, Perky 50WP, Icivo 75WP, KG T2 Care 75 WDG against Sigatoka disease caused by Cercospora musae of banana. All the tested fungicides performed better over the control (unspray) to manage the disease. The lowest PDI (7.33) was recorded in Techvo 75WG treated plot followed by SR Top 32.5 SC (8.00) and the highest (83.00) in control. The highest yield (40.4 t/ha) was recorded in Techvo 75WG and the lowest (22.25 t/ha) was in control. Among the fungicides, Techvo 75WG, SR Top 32.5 SC, Dragon 75WP, Tricofol 75WP, and Trigger 75WP showed better performance in reduction of disease severity over control.

Keywords: Banana, Fungicides, Management, Sigatoka disease, Panama disease

Location: RARS, Burirhat, Rangpur

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Pest Management

Commodity: Diseases, Banana

Objectives:

The experiment was undertaken to find out new fungicides for controlling sigatoka disease of banana.

Methodology:

The experiment was conducted at RARS, Burirhat, Rangpur during 2018-2019 cropping season. The experiment was carried out following Randomized Complete Block Design with three replications. The unit plot size was 4.0 m × 4.0 m and plant spacing was 2.0 m x 2.0 m. Thirteen new fungicides (Table 1) were sprayed 4 times at 20 days interval from June 2018 to September 2018 for controlling sigatoka disease. The test variety was BARI Kacha Kola-5. The spray schedule was started with disease appearance. Disease data were collected after 15 days of the final spray from all leaves of a plant, 0-6 (using 0= no symptom; 1= less than 1% of lamina with symptom (only streaks and /or up to 10% spots); 2= 1-5% lamina with symptoms; 3= 6-15% lamina with symptoms; 4= 16-33% lamina with symptoms; 5= 34-50% lamina with symptoms; 6=51-100% lamina with symptoms.

Infection index was computed as Percent Disease Index (PDI) =∑nb/(N-1) T* 100 where n= number of leaves in each grade; b= grade; N= number of grades used in the scale(7); T= total number of leaves scored. Yield and yield contributing characters like a number of fruits/bunch, length, and breadth of fruits and their weight were recorded randomly.

Source of Information: Annual Research Report 2018-19, Plant Pathology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All the fungicides showed significant differences over control. PDI ranged from 7.33 – 83.00%, while the lowest severity was recorded in Techvo 75WG sprayed plots which were statistically similar to SR Top 32.5 SC and the highest severity was recorded in the control treatment. The highest reduction in disease severity (more than 80%) was found among the fungicides Techvo 75WG, SR Top 32.5 SC, Dragon 75WP, Tricofol 75WP and Trigger 75WP. Maximum disease severity was observed in control where no fungicide was used.

Knowledge Management: Report/Proceedings