Fig. (3) Effects of bark treatment with SWCE on tapping cut dryness and latex yield. SWCE was applied twice with a 1-month interval without bark scraping in (a) partial-TPD- and (b) total-TPD-affected rubber trees. Bars are means ± SEM of 10 replicate trees; bars without a letter in common are significantly different (p < 0.05) according to the Waller–Duncan K-ratio t-test.