Determination of Optimum Planting Date and Resistant Varieties of Potato (Solanum Tubersum) to the Reaction of Late Blight (Phytophthora Infestans) Disease at Chencha, Southeastern Ethiopia

Select Volume / Issue:

• Volume 4,Issue 6,Nov.,2017

Year:

2017

Type of Publication:

Article

Keywords:

Disease Severity, Late Blight, Planting Date, Potato and Varieties

Authors:

Alemu, Abraham; Gudero, Getachew; Wodajo, Alemayehu

Journal:

IJRAS

Volume:

4

Number:

6

Pages:

358-363

Month:

November

ISSN:

2348-3997

Note:

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. CC BY-NC-SA 4.0 Creative Commons License: https://creativecommons.org/licenses/by-nc-sa/4.0/

Abstract:

Potato (Solanum tubersum L.) is the most commonly cultivated crop throughout the world thought it has been constrained by various biotic and a_biotic factors. Among, potato late blight disease is the major one and caused millions to be hunger. Study was conducted to identify the resistance variety and optimum planting date to the reaction of late blight disease at Chencha, Southeast Ethiopia. Three improved varieties (Belete, Jalene, Gudene) and one local cultivar with three planting dates (Feb. 20/2015, Feb. 30/2015 and March 10/2015) were examined in split plot design. Planting dates were considered as the main factor whereas varieties are as sub-plot factor. The results showed that stand count and days to 50% flowering were not significantly affected by interaction and varietal effect but, it was affected by planting date. All yield and yield related traits as well as diseases severity were showed highly significant variation on both factors, except the interaction. The maximum (54.26 t/ha) and minimum (37 t/ha) marketable yield was obtained from Belete and local cultivar respectively. Whereas, the maximum (59.22 t/ha) and minimum (24.16 t/ha) marketable yield was demonstrated from planting date Feb. 30 and Feb. 20/2015 respectively. Jalenie was identified as susceptible variety with disease severity score (77%) where as Gudene was moderately resistance with disease severity score (59.42%). The highest disease severity (92.22%) was recorded in Feb. 30 whereas the least (47.66) was demonstrated in March 10/2015. Therefore, it is advisable to producers around the study area should have to cultivate Belete variety in Feb. 30 planting date. Further research with different growing season and years are crucial for sound results and recommendations

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