Influência da calagem na incidência de colletotrichum e aureobasidium no cultivo de pitaia amarela

Abstract

The pitaya culture has been promising in Brazil for producers and new entrants to fruit growing. However, studies on plant diseases that directly impact their development and expansion are still incipient or scarce. This work aimed to evaluate the occurrence of two fungi, already registered in the State of Ceará, in yellow pitaya (H. megalanthus): Colletrotrichum sp. and Aureobasidium sp. in relation to the different doses of limestone (DC) (0; 0.48; 0.96; 1.44; and 1.92 t ha-1) the position of the cladode branch (PC) in the plant (1st, 2nd, 3rd and 4th ° order). The experiment was carried out in the field area, in ​​Fortaleza-CE, and three estimates were carried out in the period of sixty days. Assessment consist of counting the fourth level of cladodes and the presence or absence of symptoms represented by the fungi. At the end of the data assessent, an ANOVA and Tukey's mean comparison test were selected at a significance level of 5%. There was no cause/effect relationship between limestone doses and the occurrence of the two fungal diseases. This result was not expected, since some studies do show a relationship between liming and a reduction in the incidence of plant diseases. There was na effect between cladode position (PC) in the incidence of the two deseases.