THE PERFORMANCE OF DIFFERENT ROOTSTOCKS IN PEACH REPLANTING(1)
Observations made during the five years demonstrated a different influence of fumigation on yield and vegetative growth development of the trees in relation to the rootstocks used.
The trees grafted on commercial seedling - very quite intolerant to replanting - benefited more by fumigation, although they had a lower vegetative growth than the other plants grafted on hybrid GF 677. This hybrid rootstock, which showed a high tolerance to replanting, induced a higher growth and yield per plant. The prune clone rootstocks had a positive response to replanting but induced lower yield than GF 677.
Nematodes population in the soil and on the roots was determined every year; fumigation caused a nematode depletion, but, in the following years, the reinfestation rate rose slightly, reaching the same population density found in non-fumigated soil.