Impact of commonly used agrochemicals on different fungal and bacterial bio-agents: IMPACT OF COMMONLY USED AGROCHEMICALS ON DIFFERENT FUNGAL AND BACTERIAL BIO-AGENTS

B GAYATRI; R UMAMAHESWARI; M S RAO; P PRABU; K PRITI; G N GRACE; M KAMALNATH; R RAJINIKANTH; N VIDYASHREE

doi:10.56739/jor.v33i1.139054

Authors

B GAYATRI ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
R UMAMAHESWARI ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
M S RAO ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
P PRABU ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
K PRITI ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
G N GRACE ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
M KAMALNATH ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
R RAJINIKANTH ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka
N VIDYASHREE ICAR-Indian Institute of Horticultural Research, Bengaluru-560 006, Karnataka

https://doi.org/10.56739/jor.v33i1.139054

Keywords:

Bio-control agents, Compatibility, Fungicides, Pesticides

Abstract

Four fungal bio-agents viz., Trichoderma harzianum, T. viride, Paecilomyces lilacinus and Pochonia
chlamydosporia and four bacterial bio-agents viz., Bacillus subtilis, B. pumilus, B. amyloliquefaciens and Pseudomonas fluorescens were tested for their in vitro compatibility with five fungicides (carbendazim, captan, mancozeb, copper oxychloride and fenamidone + mancozeb) and three pesticides (carbofuran, metam sodium and acephate) at recommended doses of the pesticides and fungicides. The results revealed that carbendazim and metam sodium were highly toxic to all fungal bio-agents and copperoxychloride, mancozeb, fenamidone + mancozeb and metam sodium were highly toxic to all bacterial bio agents. T. harzianum exhibited more tolerance to captan than T. viride, P. chlamydosporia and P. lilacinus. All fungal bio-agents exhibited tolerance to carbofuran and acephate except P. chlamydosporia. Carbendazim was comparatively safer to B. subtilis, P. fluorescens and B. pumilus, but more toxic to B. amyloliquefaciens. P. fluorescens was relatively tolerant and Bacillus spp. was more sensitive to carbofuran and acephate. This study suggests that it is safe to integrate fungal bio-agents with copper oxychloride, carbofuran and acephate and bacterial bio-agents (except B. amyloliquefaciens) with carbendazimin integrated pest management (IPM) programmes.

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Impact of commonly used agrochemicals on different fungal and bacterial bio-agents