Effect of plant extracts against apple gray mold caused by Botrytis cinerea

In recent decades the use of chemical pesticides caused harm to human health and the environment. On the other hand¡ the wasteful use of pesticides and fungicides can cause pathogen resistance. Accordingly¡ the plant extracts can be used as an environmentally compatible way. In this study¡ it was used of water and methanol extracts of lavender¡ anise¡ eucalyptus¡ thyme and watermint to control gray mold disease caused by Botrytis cinerea of apples in the lab with mixing into medium method and disk medium¡ and also plant extracts was used in the store was with 4° C. Results showed water lavender extract with 500 micrograms per milliliter concentration had the best inhibition of pathogen with 22 mm diameter of pathogen colony. Also¡ the methanol extract of lavender with a concentration of 500 micrograms per milliliter and 31.62 mm diameter inhibition of pathogen¡ was the best extract. Watery and alcoholic extracts of lavender was the best extracts with 63.05 and 77.61% inhibition of the pathogen¡ respectively¡ compared to the control at a concentration of 500 micrograms per ml. Based on the results¡ after the lavender plant extract the fennel extract in watery extracts¡ and the eucalyptus extract in methanol had the best effect controllers in both tests. In store tests¡ watery extracts of lavender and fennel with a concentration of 6 in 1000 had the lowest diameter of spots with 8.57 and 11.72 cm compared to other treatments and control treatment. Based on the results of the laboratory and storage test¡ the lavender and fennel extract are introduced as natural compounds with high potential controller of B. cinerea.