World Journal of
Pharmaceutical and Life Sciences

BIOCONTROL OF FUSARIUM WILT OF CUCUMBER (CUCUMIS SATIVUS L.) BY BACILLUS SP.

Abla El Hartiti*, Abdelhadi Hichar, Omar Bazdi, Souad El Habchi, Khadija Ounine

ABSTRACT

The aim of this study is to test the effectiveness of three bacterial strains M12, M23 and M21 of Bacillus sp genus isolated from roots of Mint (Mentha rotundifolia L.) on the stimulation of agronomic parameters (height, fresh weight and dry weight) of Cucumber, as well as their ability to reduce the appearance of Fusarium wilt of Cucumber (Cucumis sativus L.) caused by Fusarium oxysporum. Concerning the growth stimulation, the Bacillus sp strain M21 presents a highly significant effect on all agronomic parameters and save the highest values of the growth promotion efficiency (GPE) as compared with the other bacterial strains M23 and M12. It has a GPE (%) of 71.18; 62.79; 80.79, 81.51; 65.44 and 84.37 respectively for air length, root length, air fresh weight, fresh root weight, air dry weight and root weight. Regarding the disease severity, Bacillus sp. M23 showed a highly significant reduction in the disease incidence with a percentage of 13.11 %, this corresponds to a significant biocontrol efficacy of 67.22 % against Fusarium oxysporum. In contrast, Bacillus sp. M12 presented the lowest value of the biocontrol efficacy against Fusarium wilt which only reached 33.35%. Consequently, the strains of Bacillus sp. M21, M23 and M12 genus have a stimulatory effect on agronomic parameters, and a protective effect against Fusarium wilt of Cucumber. These two effects place it among the bacteria PGPR (Plant Growth Promoting Rhizobacteria).

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