Study on the grafted tomatoes controlling root-nematode in greenhouse

The grafted tomatoes with resistant rootstock SIS-1 can resist the root-nematode（Meloidogyne spp.）.Disease indices of grafted tomatoes in the 5 plots（methyl bromide，metham-sodium，methyl bromide+VIF，metham-sodium+VIF and solar energy+BCA）are zero.The disease index of grafted tomatoes（8.4）is far lower than that of ungrafted tomatoes（95.0）and its yield has increased by 102.01% in the CK plot.There is no significant difference in disease indices among the four chemical fumigation approaches.The yield of ungrafted tomatoes in chemical fumigation plots is higher than that of CK plot and has increased by 40%.