YIELD, TREE GROWTH AND FRUIT MEASUREMENTS OF SIX SELECTIONS OF MATURE BARTLETT PEAR TREES GROWING ON SEVERAL ROOTSTOCKS

Two replicated experiments were planted in California pear orchards to evaluate rootstock adaptability to two soil types and compare Bartlett selections that had been collected from high yielding orchards within California.
The Ukiah trial planted in 1970 on shallow, gravelly loam soil contained six Bartlett selections propagated on three different rootstocks.
It was harvested in 1976, 1977, 1993, and 1994. The Solano trial was planted in 1971 on deep alluvial soil using three of the same Bartlett selections in the other trial and was propagated on five rootstocks.
These trees were harvested in 1976, 1977, 1992, and 1993.

Significant differences in yield and yield efficiency occurred in the early establishment years between selections in both trials and also occurred between selections in one of the trials during the final evaluations with a trend occurring in the second orchard.
The high yielding selections in the early years remained the high yielding when the trees were mature and were the same at both orchards.
The yield of the rootstocks was primarily related to vigor in the early establishments years whereas high vigor rootstocks were the poorest yielding as mature trees on the deepest soil and the same yielding on the poor soil.

VII International Symposium on Pear Growing

W.O. Reil, W.E. Howell

Pyrus communis, fruit quality, storage potential, Old Home x Farmingdale

https://doi.org/10.17660/ActaHortic.1998.475.19