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Proceedings of the International Plant Propagator's Society

Vol. 24


Lonnie L. Lankford

pp: 374-375

Our softwood propagation of apple rootstock, MM 106, has been going for 4 years and has become an important segment of our schedule. The first attempt was less than a success with 66,000 cuttings stuck and only 12,500 rooted cuttings packed ready for transplanting in the field. But the lessons learned from this experience laid the foundation for our present propagation procedures.

In our first attempt the cuttings got too wet and also tended to form a large amount of callus. They did not make good roots and when the hardening process started they could not make it. This meant the MM 106 needed special treatment in regard to the amount of mist received and a better system of hardening off.

The MM 106 cuttings were moved to a timer section by themselves and not allowed to become too wet, partially by reducing the number from 12,000 to 10,000 per bed. Previously the hardening scheme had started when ½ to 2/3 of the cuttings had begun rooting. But since this never happened because of the

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