Funding for this research was provided by:
Rubber Industry Smallholders Development Authority (304/PBIOLOGI/650728/P137)
Text and Data Mining valid from 2019-10-08
Received: 9 January 2019
Accepted: 24 September 2019
First Online: 8 October 2019
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.