Determination of Bactericidal Effects of Some Pesticides on Useful and Pathogenic Bacteria

The damage of chemicals that are used for plant protection and plant nutrition products used in agriculture to human health and the environment is understood better day by day. However, a significant part of this damage occurs on the beneficial microbial fauna on the plant and in the soil described as a living system. After application, many pesticides eventually fall into the soil and kill many beneficial and harmful microorganisms or decrease their population. In this study; bactericidal effects of a total of 39 different pesticides against 7 different non-pathogenic bacterial isolates, 7 non-pathogenic different bacterial isolates (Brevibacillus brevis CP-1, Bacillus megaterium TV-6D, Bacillus subtilis TV-6F, Paenibacillus polymyxa TV-12E, Pseudomonas flourescens TV-11D, Pseudomonas fluorescens FDG-37 and Pantoea agglomerans RK-79) and 2 different pathogenic bacterial isolates (Erwinia amylovora RK-228 and Pseudomonas syringae pv. syringae RK-268) were tested. Bactericidal tests were performed using the Petri Disc Diffusion Method and the recommended doses doses by manufacturer in the label information on each pesticide as the test dose were used. 4 of 15 different insecticides tested (26.66%), 8 of 14 different fungicides (57.14%), 5 of 7 different herbicides (71.42%) had bactericidal effects. No bactericidal effects of the remaining 2 different acaricides and 1 nematocide were observed. Of the 39 pesticides tested in total, 17 (43.58%) had bactericidal effects, and all of the bacteria affected by the pesticides were beneficial and the majority were Gram positive bacteria. Consequently, considering that beneficial bacteria play an important role in agriculture; in order to minimize this negative effect of used chemical pesticides on bacterial diversity, it is absolutely necessary to apply human and environmentally friendly control methods. In addition to all these applications, biopesticides should not be mixed with chemicals unless they are obliged to be used in agricultural areas.

Journal

JOURNAL OF TEKIRDAG AGRICULTURE FACULTY-TEKIRDAG ZIRAAT FAKULTESI DERGISI

Year

2021

Volume

18

Issue

2

Pages

197-212

ISSN

1302-7050

eISSN

2146-5894

DOI

10.33462/jotaf.737039

WoS UID

WOS:000658143900003