Efficacy of salicylic acid and a bacillus bioproduct in enhancing growth of cassava and controlling root rot disease
Chanon Saengchan 1, A-E
,   Piyaporn Phansak 2, A,E-F,   Toan Le Thanh 3, A,E,   Narendra Kumar Papathoti 1, 4, A,E,   Natthiya Buensanteai 1, A,E-F  
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School of Crop Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, Thailand
Division of Biology, Faculty of Science, Nakhon Phanom University, Thailand
Department of Plant Protection, College of Agriculture, Can Tho University, Viet Nam
R&D Division, Sri Yuva Biotech Pvt Ltd, Hyderabad, Telangana, India
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Natthiya Buensanteai   

School of Crop Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, University Avenue, 30000, Muang Nakhon Ratchasima, Thailand
Submission date: 2021-02-15
Acceptance date: 2021-04-08
Online publication date: 2021-04-23
The efficiency of a formulated salicylic acid (Zacha11, 500 mg/L) and a bacillus bioproduct (JN2-007, 1x107 cfu/ml) in controlling cassava root rot disease and enhancing growth was evaluated. The results revealed that cassava stalk soaking and foliage spraying with Zacha11 formulation or Bacillus subtilis bioproduct could increase cassava growth at 60 days after planting under greenhouse conditions. Zacha11 gave the tallest stem height (11.67 cm), the longest root length (18.91 cm) and the greatest number of roots (49.50). Fusarium root rot severity indices of all treated treatments were reduced, and were significantly lower than that of the water control. Plants treated with Zacha11 and JN2-007 had disease severity reduction of 53.33% and 48.33%, respectively. Furthermore, all treatments increased the endogenous SA content in cassava plants at 24 HAI with significant differences when compared to the untreated samples. The efficacy of Zacha11 and JN2-007 was evaluated at two field locations, using two different cassava varieties, cv. Rayong 72 and CMR-89. The results showed that all elicitors could suppress root rot disease as well as bacterial leaf blight. Furthermore, the elicitors helped cassava plants cv. Rayong 72 and CMR-89 to increase tuber weight, yield and starch contents, compared to the water control. Thus, it is possible that these formulations could be effective in controlling diseases and increasing cassava productivity.
The authors have declared that no conflict of interests exist.