Growers need to determine which problems demands a rootstock before establishing a vineyard. Texas growers need to consider the following problems. Cotton Root Rot is a major problem on very high pH soils in central and west Texas. It is not a problem in east Texas or on the high plains. Iron Chlorosis is a yellow leaf condition which results when the vine cannot absorb enough iron from the soil.
Nematodes are microscopic worms which damage roots and reduce the flow of water to the leaves.
On very sandy soils the nematode damage can kill the vines. Clay Soil is not recommended for commercial grapes because it is frequently poorly drained, compacted and either too wet or too dry. Extremely vigorous vines are needed for these soils. Phylloxera is a small insects which feeds on grape roots, which slowly kills the vine. Grape root phylloxera is a major reason rootstocks are used throughout the wine world.