INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGY

Volume 14, No. 07, Month DECEMBER, Year 2018, Pages 1445 - 1454

Antimicrobial and weed inhibitory activities of senna spectabilis extracts against plant pathogens

Mongkol, R. and Chavasiri, W.

Abstract Download PDF

Senna spectabilis or Cassia spectabilis belongs to Leguminosae-Caesalpinioideae is widely grown as an ornamental plant in Thailand. Antifungal and antibacterial of plant disease and herbicidal activities of S. spectabilis crude extracts were studied. The flowers and leaves extracts of S. spectabilis displayed low to moderate inhibit Colletotrichum gloeosporioides and Fusarium oxysporum (1.85-44.44%) at 1,000 ppm. The flowers extracts from dichloromethane was showed the highest against Rhizoctonia solani (47.04%). However, these extracts could not inhibit the mycelial growth of Phythophora parasitica. Moreover, methanol stem extract inhibited Erwinia chrysanthemi and Xanthomonas axonopodis at 16.00±1.20 and 25.00±5.00 mm at 010111 ppm, respectively. Furthermore, the methanol extract from leaves and dichloromethane extract from flower of S. spectabilis at 100000 ppm were completely inhibited the germination, the growth of shoots and roots of Swollen finger grass (Chloris barbata) and followed by methanol extracts of flower and stem with 95.50% germination inhibitory. While the seed germination of Chinese Cabbage-PAI TSAI (Brassica chinensis Jusl var. parachinensis (Bailey) Tsen & Lee) was inhibited by dichloromethane flower extract at 71.38%. Moreover, the growth of Chinese Cabbage-PAI TSAI was completely inhibited by methanol leaves and flower extracts from this plant. This research was demonstrated the potential of S. spectabilis to inhibit plant pathogens, weed germination and growth. These extracts should be applying to agriculture to control weed and microbial plant pathogens for reduce chemical use and non-toxic to the environment.

Keywords

Senna spectabilis, plant disease, germination, herbicidal activity

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