Research on identifying new varieties and cultivated techniques protocol to improve productivity and economic efficiency in tomato production in red river delta

Many trials have been implemented to complete grafted protocol and evaluating benefit of using Savior scion to grafte on rootstock EG203, Hawai7996 and Cagai . Thess results were support for producing grafted seedling at Summer-Autumn season in RRD. To grafte Savior scion on rootstock EG203 need to sow EG203 before Savior 19 days. Do grafting when rootstock have 3-4 real leaves, seedling heigh is 18,0-20,0 cm, stem diameter 0,26-0,28 cm. The grafted plant need 4 days after grafted in cool condition and 13 days in normal condition to recover before transplanting. To grafte Savior on rootstock Hawaii 7996 need to sow rootstock before Savior 1-2 days, do grafting when rootstock 3-4 real leaves, seedling heigh is 18,0 - 20,0 cm, stem diameter is 0,28 cm, The grafted plant need 4 days after grafted in cool condition and 12-13 days in normal condition to recover before transplanting. To grafte Savior on rootstock Cagai need to sow rootstock before Savior at least 24 days, do grafting when rootstock 3-4 real leaves, stem diameter is 0,25 cm, The grafted plant need 5 days after grafted in cool condition and 15 days in normal condition to recover before transplanting. The grafted survival rate reach to 85,6-92,1% by these protocol and these results were adapt to production required . By bacterial ioculation and evaluation results showed that rootstock Hawaii7996 variety had high tolerant to Bacterial wilt that can be used as good rootstock to grafte on tomato variety to a voice BW pressure.

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