Enhancing Red Globe Grapevines Growth, Yield, and Quality with Various Bio -Stimulant Applications

The present study was carried out during the course of two subsequent seasons (2023 and 2024) in a private vineyard located in Samalot district, Minia Governorate to evaluate the positive effect of various bio-stimulants (Seaweed extract, EM and Compost tea) and their combinations on growth, yield and quality of vigour twelve-year old own-rooted Red Globe grapevines.Regarding vegetative growth traits (Main shoot length, number of leaves/shoot and leaf area), results revealed that all combined treatments were better than single and control treatments and increased vegetative growth traits particularly that of (seaweed extract 25 ml/vine + EM 20ml /vine as soil amendment).The highest values of yield / feddan were recorded in vines treated with the combined treatments (seaweed extract 25 ml / vine + E.M 20 ml /vine and 50 ml compost tea at 10 % /vine + EM 20 ml l vine (18.7 and 1.88 ton) and (17.8 and 18.6 ton) as compared to all other treatments during the two seasons, respectively.Finally, under experiment conditions it could be concluded that to improve vegetative, yield and quality of Red globe grapevines this investigation recommended to use seaweed extract and compost tea as a foliar application and Effective Microorganisms (EM) as soil amendment whether if it in a single or combined treatments, the seaweed extract 25 ml / vine + EM 20 ml /vine as soil amendment combined treatment is the most effective among all treatments during both studied seasons.