Document Type : Original Article
Authors
1
Plant Pathology Dept., Fac. of Agric., Ain Shams Univ., Cairo, Egypt
2
Plant Pathol. Dept., Fac. of Agric., Ain Shams Univ., Cairo, Egypt.
3
Potato Brown Rot Project (PBRP), Minst. of Agric., Giza, Egypt
4
Plant Pathol. Dept., Fac. of Agric., Ain Shams Univ., Cairo, Egypt
Abstract
Bacterial wilt disease caused by Ralstonia solanacearum is one of the most important and widespread bacterial diseases of
solanaceous crops in tropical, sub-tropical areas and some warm regions. The present research was aimed to evaluate some chemical and organic amendments, individually or in combinations, for controlling potato bacterial wilt disease under greenhouse and field conditions. Application of chemical amendments i.e., urea, ammonium nitrate and ammoniated superphosphate, as well as organic amendments i.e., garlic, cabbage and camphor dry leaves, either individually or in mixture, reduced severity of potato wilt under greenhouse and field conditions compared to the check treatment.
Efficiency of tested amendments increased with increasing their application rates. In greenhouse experiments, chemical amendment was more effective than organic ones in disease control. Moreover, mixed treatments was more effective than their individual applications. Meantime, urea (as a chemical amendment) and dry garlic leaves (as an organic amendment), either individual or in mixture, were the most effective. Under field conditions, the population of R. solanacearum in rhizosphere, crown and potato tubers, along with severity of wilt were decreased, meanwhile potato
yield was increased with mixing chemical and organic amendments compared to the check. Mixing urea with dry garlic leaves was the most effective to reduce population of R. solanacearum and to increase the yield, but other mixtures were moderately effective
Keywords
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