Efficacy of bioagents and fungicides against Phytophthora nicotianae infecting crossandra
DOI:
https://doi.org/10.5958/2582-2683.2021.00028.9Keywords:
Crossandra, Bio-agents, Phytophthora nicotianae, Fungicides, soil borneAbstract
Phytophthora nicotianae causing a polycyclic soil borne disease infects a wide range of host plants belonging to different families all over the world. The foot and root rot disease of crossandra is a major setback for its cultivation in the country, wherever the crop is grown, causes huge loss to flower industry. Due to soil borne nature of the disease, management is challenging process. Therefore, aim of present study is to know the bio-efficacy of the fungicides and bio-agents against Phytophthora nicotianae causing the root rot disease of crossandra. Ten different novel fungicides and bio-agents were screened against root rot disease under in-vitro condition. Of these, most of the systemic fungicides were found to completely inhibit radial growth of the fungal mycelium, whereas in case of bioagents, Trichoderma harzianum (84.19%) and Streptomyces viridobrunneus (81.44) was found to be most effective in reducing the mycelial growth inhibition of Phytophthora nicotianae.
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