THE DETERMINATION OF THE EFFICACY OF SOME MICROBIAL PREPARATIONS AGAINST APPLE SCAB DISEASE (VENTURIA INAEQUALIS (CKE) WINT.) IN ISPARTA
Journal Title: Black Sea Journal of Agriculture - Year 2018, Vol 1, Issue 4
Abstract
The effect of Trichoderma harzianum (T-22), Bacillus subtilis (BS), mycorrhizal preparations (Endo Roots Soluble) and combinations was investigated against apple scap disease [Venturia inaequalis (Cke.) Wint.]. Biological preparations were applied as foliar and soil application in different combinations. The experiment was established in gardens with a Scarlet-Spur apple variety of 3 years old in Egirdir. Biological preparations were applied at 3 times in April-May 2017, taking into account the warnings of the early warning system at the recommended doses. Dictotom blue (Mancozeb) + Nimbus (Micobuthanil) was used as commercial fungicide. After 21 days of application, disease severity was assessed according to scale 0-4. The results obtained according to the scale values were calculated to the % disease severity by applying the Towsend-Heuberger formula and the% effects of the biological preparations according to the Abbott formula. Test results were evaluated by Tukey multiple comparison test using variance analysis with SPSS 21 statistical program. As a result, the difference between all the applications was found significant (p<0.05). Based on the results of the experiment, the lowest disease severity was obtained from T-22 (foliar application) (12.2%) against Venturia inaequalis. Disease severity was determined in the application of Dicotom blue + Nimbus (13.2%) and Mycorriza (14.8%) respectively. The percentage of disease severity in control plants was observed as 40.2%. In the experiment, it was determined that the highest % efficacy values of the biological preparations were for T-22 (foliar application) (69.65%), T-22 (foliar application) + B. subtilis (foliar application), (67.66%) Dikotom blue+Nimbus (67.19%) and mycorrhiza (soil application) + B. subtilis (foliar application), (64.18%) respectively. The lowest % efficacy values of the biological preparations were determined in the application of B. subtilis (foliar application) (48.76%), T. harzianum (soil application) (53.23%) and T-22 (soil application) + B. subtilis (foliar application) (58.71%). As a result, biological preparations could be used as an alternative to chemical control, because of its positive aspects in terms of environment and food safety.
Authors and Affiliations
Oğuzcan ÇALTILI, Şerife Evrim ARICI
Keywords
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