Introduction

The gall wasp Andricus quercuslaurinus Melika & Pujade-Villar causes the death of Quercus affinis Scheidw. in Acaxochitlán, Hidalgo. The genetic capacity of parents with tolerance to the pest can be conserved by grafting.

Objectives

The aim of this study is to establish the conditions for grafting of Quercus affinis individuals tolerant to A. quercuslaurinus attack.

Materials and methods

Scions of five tolerant and five susceptible phenotypes were collected. Homografts (Q. affinis scions on Q. affinis rootstocks) and heterografts (Q. affinis on Q. rugosa Née) were made with terminal fissure and side-veneer graft. Tests were carried out on five dates and with materials of different ages. Grafting success was evaluated with ANOVA and Tukey's test (P = 0.05). Grafting was determined by fitting the Weibull accelerated failure time model.

Results and discussion

Statistical differences (P ≤ 0.05) were found in grafting by phenotype effect. Grafting success rate with scions from tolerant trees was 166 % higher than with scions from susceptible trees. The highest grafting was obtained in homografts (90 %) with scions from young tolerant trees (12 years old) and heterografts (88 %) with scions from adult tolerant trees (35 and 40 years old).

Conclusions

The propagation of Q. affinis individuals tolerant to A. quercuslaurinus attack is possible by homografts (young trees) and heterografts (adult trees) with Q. rugosa rootstocks, preferably in early autumn.

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