THE ESTABLISHMENT OF PROCECIDOCHARES CONNEXA IN WEST JAVA, INDONESIA : A BIOLOGICAL CONTROL AGENT OF CHROMOLAENA ODORATA
AbstractKirinyu (Chromolaena odorata (L.) R.M. King and H. Robinson) was reported for the first time
in 1934 from Lubuk Pakam North Sumatera. It grows vegetatively during the wet season, flowers and
sets a high number of fruits at the end of the wet season, and senesces during the dry season. It
may be controlled manually by uprooting the weed or by slashing, and chemically by spraying with
herbicides. However, this has not been successful. Recently a biological control agent,
Procecidochares connexa was introduced at Parung Panjang, West Java, as a biological control
agent of C. odorata. This paper reports the successful establishment of Procecidochares connexa.
Two releases of P. connexa colonies were made in Parung Panjang at the end of 1995. The colony
was able to survive through a harsh dry season of 1997. When C. odorata was swept by fire, the
emerging shoots soon were attacked by P. connexa. The population of C. odorata went down to
37.2% with 31.8% of its emerging shoots attacked by P. connexa in a 2-year period. When twigs were
attacked byÂ P. connexa,Â the production of cypsellas was reduced by about 50% in one season.
However, the survival of emerging flies was also affected by the death of twigs upon maturation of the
Key words: Biological controUChromolaena odoratalProcecidochares connexa
How to Cite
Copyright (c) 2017 BIOTROPIA - The Southeast Asian Journal of Tropical Biology
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors who publish with this journal agree with the following terms:
- Authors retain copyright and grant the journal right of first publication, with the work 1 year after publication simultaneously licensed under a Creative Commons attribution-noncommerical-noderivates 4.0 International License that allows others to share, copy and redistribute the work in any medium or format, but only where the use is for non-commercial purposes and an acknowledgement of the work's authorship and initial publication in this journal is mentioned.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).