Pengaruh Umur Buah Dan Faktor Iklim Terhadap Serangan Penggerek Buah Jeruk Citripestis Sagitiferella Mr. (Lepidoptera:Pyralidae)

Abstract

. Muryati. 2007. The Effect of Fruit Maturity and Climatic Factors on Damage Intensity of Citrus Fruit by Fruit borer Citripestis sagitiferella (Lepidoptera:Pyralidae).The objective of this research was to understand the effect of fruit maturity and climatic factors on damage intensity of citrus fruit by fruit borer C. sagitiferella. The experiment was conducted at Batu, Malang from August 2001 to July 2002. The experiment to observe the fruit damage by citrus fruit borer on several fruit maturity and climatic conditions were conducted by survey method, while the composition of volatile compounds was done by extraction of fruit peel through steam distilation. Characterization of volatile compounds composition were analized by gas chromatography at Laboratorium of Physic and Chemistry Analysis, Gadjah Mada University, Yogyakarta. The results showed that damage intensity of fruit caused by C. sagitiferella was influenced by concentration of the component of volatile compounds on the different fruit maturity and the number of the rainy days. Limonen as the dominant component on citrus volatile compounds did not affect the preference of C. sagitiferella moth, but along with other components increased the preference. The high number of rainy days increased fruit damages by the moth. The results of this research was usefull for minitoring programe of C. sagitiferella so that the right time of controlling the pest can exactly be decided