The incidence of Early blight diseases in Tomato plants at different varieties to determine resistance varieties White Nile State Season (2018-2019)

Abstract

Likewise, six varieties of tomato were screened for their resistance to early blight disease under natural infection conditions namely, Castle Rock, Strain B, B286, Hiraihry, Goal, Domestic (Local one)). The results of the screening of tomato varieties for resistance to early blight disease under natural infection attest the high level of resistance of the domestic variety to the disease (33.3%) followed by strain B (55.6%) and B286 (77.8%) compared to other varieties where the percent of disease incidence range from 88.9 to 100% infection. Nevertheless, this comparatively low level of disease incidence in these two varieties was coupled with high productivity in comparison to other varieties. Results Mean percent incidence of early blight disease on some tomato varieties screened for their resistance to the disease under natural infection. The results of the interaction of tested tomato varieties with early blight disease under natural infection were presented in table 8. All tomato varieties screened for evaluation of their resistance to the disease were infected but at variable level. Nevertheless, the domestic variety (Allah Kareem) showed low percent of disease incidence with 33.3% followed by the hybrid Strain B compared to other tested varieties. The other varieties exhibited high level of disease incidence ranging from 77.8 % with B2-86, 88.9 with varieties Castle rock and Hiraihry and 100 % with Goal.