SYNTHESIS PROCESS OF SEX PHEROMONE OF COFFEE WHITE STEM BORER {(S)-2-HYDROXY-3-DECANONE}

摘要

Cerambycidae), has become a major constraint on production of arabica coffee, and absence of control measures in causing growers to shift from arabica in favour of the lower grade robusta. Loss of production due to X.quadripes on arabica is a capital loss caused by the need to uproot and replace infested plants, and it is estimated that the national loss due to this pest is 130 m rupees per year. Arabica has higher production costs than robusta, but the return is nearly 50 % greater and it is important that the acreage of arabica is maintained for India's reputation as a quality producer. X. quadripes is also the most serious insect pest of arabica coffee in Sri Lanka, China, Vietnam and Thailand (Le Pelley, 1968). The adult females lay eggs in crevices in the bark and the hatching larvae tunnel into the trunk and roots, causing death in young plants of seven to eight years old while older bushes may survive for a few season but eventually succumb. Current control measures include maintenance ofgood shade as the adults are more active in sunlight, although this reduces photosynthesis and yield. Removal of loose