Potency of guava shoot extract as a control means against Diaphorina citri M E Poerwanto12 and C Solichah1
1Faculty of Agriculture, UPN ^Veteran^ Yogyakarta
2Correspondent author
2email: mofit.eko[at]upnyk.ac.id
Abstract
CVPD is the most devastating disease on citrus production in Indonesia and in the world. It is vectored by Diaphorina citri. Guava leave extract is a prospective control means for reducing vector population. Research was conducted to investigate the repellent effect of guava shoots to adult of D. citri (psyllids) and the attractiveness to its predator Menochilus sexmaculatus. Repellent effect of grinded dried of upper, middle, bottom shoot of red, white, and non-seed guava shoots to D. citri and M. sexmaculatus of mixed gender were determined in Y-tube olfactometer. The result showed that guava shoots had repellence effect to D. citri. Highest repellence effect was found from white guava shoots, followed by non-seed guava and red guava. Repellent effect was 80.7%, 72.7%, and 70.0% respectively. However they did not have any repellent effect to M. sexmaculatus. Guava shoots had the attractiveness effect to M. sexmaculatus adult. The effect was higher on upper, middle, and bottom shoot of red guava, and white guava, and middle shoot of non-seed guava than on upper shoot of citrus. Exception phenomenon was found on upper and bottom shoot of non-seed guava. The attractiveness on those shoots was lower than on citrus leaves. It was able to use guava shoots to repel D. citri and to attract M. sexmaculatus adult as a part of control means of D. citri vector of CVPD disease.
Keywords: Diaphorina citri, guava, CVPD, vector, M. sexmaculatus
