INCIDENCE AND DISTRIBUTION OF DOWNY MILDEW DISEASE (PERONOSCLEROSPORA SORGHI) OF SORGHUM IN UGANDA.
Journal Title: International Journal of Advanced Research (IJAR) - Year 2018, Vol 6, Issue 5
Abstract
Sorghum (Sorghum bicolor) ranks as the third most important staple cereal food crop in Uganda after maize and millet. The crop is hampered by several biotic stresses of which Sorghum Downy Mildew disease is one of the most devastating diseases. The disease is caused by a soil-borne fungus Peronosclerospora sorghi but it is also air-borne through conidia. Incidence and severity of downy mildew were conducted between March-June, 2016 and September-December 2016 growing seasons in 13 sorghum-growing districts across ten agro-ecological zones. Data collected were subjected to analyses of variance, correlation and linear regression. Significant (P < 0.001) differences were recorded for disease incidence and severity across the different agro-ecologies. The mean downy mildew disease incidence varied significantly (P< 0.001) from 49.4 % for Pader to 78.9 % for Namutumba. Disease severity varied significantly (P <0.001) from 2.3 for Pader to 3.5 for Pallisa. Chi-square test for independent association between cropping season and downy mildew disease incidence showed a high significant test statistic values (χ2 = 140.89, d.f = 3, and P < 0.001). A significant (P<0.001) positive correlation was observed between disease incidence and severity (r = 0.498) while a significant negative correlation was observed between disease incidence and rainfall (r = -0.675) due largely to temperature and relative humidity. Multiple linear regression analysis revealed that temperature, relative humidity, rainfall and altitude explained 49 % of the total variation associated to disease incidence. Variations in the incidence and severity of downy mildew disease prompt the need to screen for resistant/tolerant sorghum varieties.
Authors and Affiliations
Kumi Frank, Agbahoungba Symphorien, Tusiime Geoffrey
Keywords
Related Articles
- EP ID EP297141
- DOI 10.21474/IJAR01/7117
- Views 52
- Downloads 0
NURSE INTERNS SATISFACTION WITH THE CLINICAL LEARNING ENVIRONMENT: A CROSSSECTIONAL STUDY.
Background: As part of nursing education clinical internship forms an integral part of the learning experience. Since nursing is a skills-based profession, clinical internship plays an important role in enabling a studen...
ROLE OF PANCHAKARMA IN THE MANAGEMENT OF POLYCYSTIC OVARIAN SYNDROME.
Polycystic ovarian syndrome is a complex endocrine disorder. It is prevalent in young reproductive age group of women. Incidence varies between 8-10%, more common amongst infertile women. In present era due to sedentary...
VIRAL LOAD AND T CELL SUBGROUP DYNAMICS OF PATIENTS TREATED FOR CHRONIC VIRAL HEPATITIS B.
Backround: T cell activation plays an important role in tissue injury and viral clearance during the antiviral immune response. In our study we aimed to assess the viral load and peripheral blood T lymphocyte subgroup dy...
ARTICULATORY STABILITY OF NON-SENSE LABIODENTAL SEQUENCES IN PERSONS WITH STUTTERING.
The study aimed at understanding the articulatory stability differences fornonsense labiodental sequences in persons with stuttering and age, gender matched typical adults. Group 1 consisted of 5 [3M,2F] Persons with Stu...
PHENOTYPIC CHARACTERIZATION OF SENEGALESE PEUL-PEUL SHEEP.
Peul-peul sheep population is numerically the most important among sheep raised in Senegal. It is well adapted to the extensive farming system in the arid zone and plays an important socio-economic role in rural and urba...