Abstract
Impact of seed dressing and systemic fungicidal sprays in controlling the magnitude and spread of the late blight (Phytophthora infestans) disease in addition to augmenting the yield of superior grade potato tubers
Highlights
Potato (Solanum tuberosum L.) is one of the most important food crops worldwide which represents a valuable source of nutrients in a balanced diet
The results obtained during 2016 cropping season (Table-1) revealed that all the fungicidal seed dressers delayed the appearance of first symptoms of the disease
The disease incidence and intensity recorded indicated that all the fungicides significantly reduced the late blight at all the periods compared to check, such that a terminal disease incidence and intensity of 83.33 and 35.00, in control, were reduced to 50.00 and 21.55 per cent, respectively, in tubers treated with Metalaxyl 8 + Mancozeb 64 WP
Summary
Potato (Solanum tuberosum L.) is one of the most important food crops worldwide which represents a valuable source of nutrients in a balanced diet. Controlling late blight has become increasingly demanding because of the evolution of new races by gradually developing resistance against available chemical fungicides, among all disease controlling strategies, chemical control proved to be the most effective one in reducing the intensity of disease and crop yield losses. Protectant fungicides are prophylactic in nature, which are applied before the occurrence of the disease further checking the symptom development. As pathogen is primarily seed borne in nature, it is necessary to protect the disease infection at this stage itself. Apart from the seed dressing in this study, very importantly systemic fungicidal sprays at ten days intervals after symptom development until dehaulming stage of potato crop was taken up to assess the amount of disease reduction as well as the increase in tuber grade, quality and yield of potato
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