Journal of Plant Pathology & Microbiology

Abstract

Evaluation of Aleka 33% EC Fungicide against Net Blotch (Pyrenophora teres and Leaf Scald Diseases (Rhynchosporium secalis) on Barley

Zerhun Tomas Lera*

In Ethiopia, barley is predominantly considered as food crops and ranks fifth after teff, maize, sorghum and wheat. Barley productivity is low (1.97 t/ha) in Ethiopia ascompared to world average of 3.1 t/ha and the reduction in productivity of the crop is mainly directed to multidimensional a biotic stresses and biotic stresses. In Ethiopia about 40 plant diseases, have been recorded on barley. Among them widespread occurrences of barley scald and net blotch foliar diseases is limiting barley production worldwide including Ethiopia. Field experiment was conducted to verify the effectiveness of the Aleka 33% EC fungicide (Cyproconazole 8%+Proconazole 25%) against net blotch (Pyrenophora teres) and leaf scald diseases (Rhynchosporium secalis) on barley. It’s carried out at three locations, Kokate, Dalibo Wogane and Bossa Qacha, on farmers’ field in a Randomized Complete Block Design (RCBD) with five replications during 2022 cropping season. The experiment result showed that, fungicide treated plots were showed significant difference compared to the control treatments in all variables. Evidenceobtained from the verification trial showed that Aleka 33% EC (Cyproconazole 8%+Proconazole 25%) at the rate of 0.5 lit/ha with 200 liter water acted significantly at 5% probability level in managing barley net blotch and leaf scald and consequently increased grain yield of barley as compared to the standard check (Natura 250 Ew) and unsprayed checks in tested locations. Considering the present investigation, it is concluded that Aleka 33% EC at the rate of 0.5 lit per hectare with 200 liter of water was found the best by minimizing barley net blotch and leaf scald in all experimental locations. During the growing periods, no foliar toxic effect was observed from the effect of any tested fungicides. Generally, results showed that Aleka 33% EC at the rate of 0.5 lit/ha per hectare with 200 liter water was highly effective in controlling barley net blotch and leaf scald diseases of thebarley. Therefore it is recommended for registration to the management of the barley net blotch and leaf scald diseases of the barley.

Published Date: 2023-12-05; Received Date: 2023-06-24