02461nam a22002777i 4500001000800000003001000008007000500018008004100023040003500064041000800099043000700107084000700114100003300121245008500154264001100239300004600250336002700296337003300323338002800356504004200384520163300426650001202059650002002071651001902091773007302110B-12632CO-BoFNCPt|| 091006s2009    my     r           eng d   aCO-BoFNCPbspacCO-BoFNCPerda  aeng  amy  aA-0 aChan Weng Hoongeautor.4aut10aRe-evaluation of controlled pruning in young rubber in a large group of estates. 4c©2009  apáginas 79-87 :bTablas, fotografías.  atextobtxt2rdacontent  asin mediaciónbn2rdamedia  avolumenbnc2rdacarrier  aIncluye referencias bibliográficas.  aThe controlled pruning technique as advocated by the Rubber Research Institute of Malaysia based on studies on older clones, namely RRIM 600 and GT1, was adopted by a large group of estates after some slight modifications. However some practical problems were encountered with implementation of the system, due mainly to shortage of labour. These included suppression of terminal growth caused by the clustering effect of branches, large unsightly scars due to delay in pruning and much labour and cost involved. In the light of the above and also in view of newer and more vigorous clones currently being planted by the industry, controlled pruning was re-evaluated in comparison with flushed pruning. The re-evaluation was carried out on modern clone RRIM 2024. After the 18th, 24th, 36th and 48th month, controlled pruning showed 7 percent, 4 percent, 2.2 percent and only 1.6 percent correspondingly better than flushed pruning. The comparatively improving growth in the flushed pruning treatment with the passage of time was due to the expanding canopies after branches were left unpruned from above a height of 250 cm from the ground. At the 24th month, drip-line of canopies was 20 percent wider in flushed pruning compared with controlled pruning. Controlled pruning required from 18 to 24 rounds of pruning compared with five to six rounds for flushed pruning. When pruning rounds were delayed in controlled pruning, branches turned brown in colour and caused large scars to form when pruned. Overall, controlled pruning did not confer greater girth advantage over flushed pruning, especially on modern vigorous clones. 0aCaucho. 0aPoda controlada 0aPoda con quema0 aThe Planter (Malasia)gv. 85, no. 995 (2009), p.79-87wA-x0126-575x