Efficiency of different doses of insectofungicidal biopreparation (Gaupsin) against phytophthora of tomato in Adjara, Georgia
Keywords:
gaupsin, phytophthora, sprays, tomato varieties, yieldAbstract
During 2019 and 2020 the field study was conducted at In Khelvachauri district (village Sameba) of Adjara, Georgia. Blight caused by Phytophthora infestans and Ph. parasitica is an important disease of Tomato (Lycopersicon esculentum Mill.). Study was aimed to determine the efficacies of different doses of biopreparation of Gaupsin against Phytophthora of tomato. Five tomato varieties (Jina, Florida 47, Shady-Lady, Adlia and Choportula) were sown in five replications with one standard check in tunnel. Gaupsin were applied after 7 days intervals. Disease data was recorded after ten days interval from flowering stage to onward. Average yield of each variety was calculated afters pickings.Studies show that over both years, all doses of gaupsin reduce disease severity compared to untreated plants. The highest reduction in the disease was achieved by applying gaupsin 12 mg/ml and 14 mg/ml of water at an interval of 7, 14, 21 and 28 days. Plants had increased leaf, shoot, fruit and root biomass. Among the five cultivars tested, Jima produces higher yields (6150 g) per plant, followed by Florida 47 (6000 g) and Shady Lady (5150 g) compared to Choportula (4300 g) and Adlia (3750 g). Overall results revealed that weekly sprays of gaupsin at 12 mg/ml of water were cost effective and eco-friendly for the management of Phytophthora blight of tomato. Based on a general analysis, it is very clearly shown that the investigation is an important step towards developing plant bioprotection strategies for antifungal activity against the important phytopathogen. That can be beneficial for farmers and researchers who involve in agriculture.
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