Resumo

BOGANTES-ARIAS, Antonio  e  MORA-NEWCOMER, Eric. Evaluación de cuatro patrones para injertos de guayaba (Psidium guajava L.). Agron. Mesoam [online]. 2010, vol.21, n.1, pp.103-111. ISSN 2215-3608.

Evaluation of four rootstocks for graft in guava (Psidium guajava L.). The work was conducted at Estación Experimental Los Diamantes, INTA, from 2004 to 2007, in order to determine the effectiveness of various rootstocks on guava grafting. Four rootstocks were evaluated: three different Psidium friedrichsthalianum (cas) rootstocks and one Psidium guajava (guava) rootstock, on the growth and development of a guava experimental clone. In the nursery, 100% successful grafts were obtained with guava and "brazilian" cas rootstocks, while success with "arrayán" and "cas criollo" was 90%. Initial vegetative growth was significantly higher in the guava rootstock treatment. In the field, this treatment also showed more vigorous growth. "Arrayán" rootstocks clearly showed a strong dwarfing effect, while the "Brazilian cas" and the "cas Criollo" rootstocks exhibited an intermediate effect on vegetative vigor. Number and weight of fruits was higher when guava was used as a rootstock, and no differences were observed with cas rootstocks. In order to evaluate the susceptibility of the rootstocks to nematodes of adult plants, an additional control treatment was included in the field, which consisted of the application of nematicide to the guava rootstock treatment. The results indicate that Meloidogyne sp. and Pratylenchus sp. were able to colonize the roots of the guava rootstocks with and without nematicide, as well as roots of "Brazilian cas". No nematodes were detected in the roots of the "cas "criollo" and "Arrayán" rootstocks.

Palavras-chave : Cas "arrayán"; Brazilian cas; nematodes; Psidium guajava.

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