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Efficacy of New Fungicides in Controlling Late Blight of Potato (2017 - 2018)

A K Saha
RARS, Burirhat, Rangpur

Abstract/ Executive Summary:

The experiment was conducted at RARS, BARI, Burirhat, Rangpur during the rabi season of 2017-18 to evaluate eighteen new fungicides against late blight of potato under natural inoculum pressure. Results revealed that New Cobra 72 wp, Blastin 38SC, Grace 72 wp, Sharimox, Hantivo 32.5wdg, Infinito Pro 72.7 wp, Luna Sensation 50 Sc, Mantacrop 72wp, Win field 72 wp and Amana 50 wp fungicides effectively managed late blight disease of potato and yielded more than 30 t/ha.

Keywords: Potato, Late blight, Phytophthora infestans, Fungicides

Location: The experiment was conducted at RARS, BARI, Burirhat, Rangpur

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Pest Management

Commodity: Diseases, Potato, Fungicide

Objectives:

The present study was designed to select effective fungicide(s) from 18 (eighteen) new fungicides for managing potato late blight disease.

Methodology:

The experiment was conducted to evaluate the efficacy of 18 (eighteen) new fungicides in controlling late blight of potato at RARS, Burirhat, Rangpur during Rabi 2017-18. One known fungicide Zampro DM (Ametcotradin 30% + Dimethomorph 22.50%) as positive control and without fungicide sprayed plot as absolute control was also considered as treatment in this experiment. The design of the experiment was RCB with 3 replications. Block to block and plot to plot distance was 1.5 m and 1m, respectively. The unit plot size was 3m x 1.0 m. Susceptible potato variety BARI alu-7 (Diamant) was planted on 04 December 2017 following 60 cm x 25cm spacing. Recommended fertilizer doses and other agronomic practices were done properly. The spray was started from 03 January 2018 and plots were sprayed 6 times at 10 days interval. Haulm killing was done 90 days after planting harvesting was ensured 10 days after haulm killing. Data on foliage destruction (%) due to late blight at 90 days after planting and tuber yield (t ha^-1) was recorded and analyzed statistically.

Source of Information: Annual Research Report 2017-18, Plant Pathology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering all 122, 129, 135, 139, 141, 151, 153, 156, 160 and 165 coded fungicides effectively managed late blight disease of potato and yielded more than 30 t/ha. This was first-year observation. So, it needs at least one year more investigation for conformation the result for release as an effective fungicide against late blight disease.

Knowledge Management: Report/Proceedings