Artificial Leaf Blight Of Rice Essay
Bacterial Leaf blight Disease is the most disastrous aspect of reducing the rice yield all over the world. Different Genotypes and inbread lines are tested time to time to remain ahead of the Pathogen races and to keep finding the resistant sources. So keeping in view ten rice varieties which are popular in their taste and aroma were screened against the particular disease by artificially inoculating them with the pathogen and disease severity was estimated according to the standardized method after 1st , 2nd and 3rd week consecutively till maximum infection was attained. This represented 70% of test entry being infected at very early stage as In first week, 7 out of 10 rice varieties were infected by Bacterial leaf blight of rice. None of the variety was found immune, highly resistant, or resistant against Bacterial leaf blight disease of rice. Only 1 variety (KSK-133) exhibited as moderately resistant, 6 varieties (Basmati 385, Basmati-515, …show more content…
It affected the crop at all stages and showed either “Kresek” or leaf blight symptoms (Akhter, 2008). Diseased plants if produce panicles, they remain sterile or produce a number of immature grains. When there is heavy infection, no grain formation takes place. A survey was conducted during the cropping year 2002 in Punjab, Sindh, Baluchistan, KPK and Azad Jammu & Kashmir to study the latest situation of this menace, in which high incidence of the disease was reported in all over the surveyed areas (Akhtar et al.,2003).the disease has potential to become severe threat in Pakistan as it has emerged as epidemics several times. (Khan, 2009: Waheed et al., 2009). It has been reported that all the commercial basmati varieties normally cultivated in Punjab were highly susceptible to bacterial leaf blight (Cheema et al., 1998; Khan et al., 2000a, b; Akhtar et al., 2008; Ali et al.,
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