Iranian Journal of Plant Protection Science

Iranian Journal of Plant Protection Science

Evaluation of the Rouin1 biological fungicide in management of Rhizoctonia root rot of sugar beet

Document Type : Research Paper

Authors
Mahyar Sheikholeslami 1
Shahram Naeimi 2
Seyed Bagher Mahmoudi 3
Ali Jalilian 4
1 Agricultural and natural resources research center of Kermanshah
2 Prof. Assistant for biological control Research Department, Iranian Research institute of Plant Protection, AREEO, Tehran, Iran.
3 Prof. Associate for Research Department of plant breeding, Sugar beet seed institute, Karaj, Iran.
4 Prof. Associate for Sugar beet Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran
10.22059/ijpps.2021.315025.1006962
Abstract
In this study, the efficacy of the biological material named as Rouin1 based on Bacillus subtilis BS106 in controlling Rhizoctonia root rot disease of sugar beet was evaluated. The experiment was carried out as split plots in the pattern of randomized complete block design in two research farms in Kermanshah county. The major factor was seed coating with Rouin1 at various conditions. The minor factor was irrigating and not irrigating the plots with Rouin1 solution. All of the plants were inoculated with R. solani RS 124 inoculum 8 weeks after planting. The results of this study showed that major factor as seed coating had no effect on disease severity or crop yield in different forms, but minor factor as irrigating with bacterial solution reduced disease severity and increased crop yield at 1% probability level. By applying irrigation treatment of Rouin1 commercial material at the rate of 200 g/ha at two stages of 45 and 90 days after planting, the average disease index decreased from 4.4 (average control treatment) to 3.58 (average irrigation treatment). As a result, the disease index decreased by 0.82 units (approximately equivalent to 8.2% of the infection rate). Also, the average yield increased from 39,560 kg in the control treatment to 48080 in the irrigation treatment, which is equivalent to 17.72% of production increasing per hectare.
Keywords
Biological control
Rhizoctonia root rot
seed treatment
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Iranian Journal of Plant Protection Science
Volume 52, Issue 2
February 2022
Pages 87-95

  • Receive Date 14 December 2020
  • Revise Date 01 June 2021
  • Accept Date 20 June 2021