Relationship between tapping intensity and tapping panel dryness susceptibility of some clones of Hevea brasiliensis in Southwestern Côte d’Ivoire

Obouayeba, Samuel; Soumahin, Eric Francis; Okoma, Khoffi Mathurin; Boko, A. M. C. K.; Dick, Emmanuel; Lacote, Régis

doi:10.5251/abjna.2011.2.8.1151.1159

Cited by 8 publications

(11 citation statements)

References 1 publication

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“…However, the cumulative yield of T 5 was not the highest but comparable to that of T 1 , S/2 d2 tapping system. These results confirmed that tapping frequency is negatively correlated to the yield per tapping per tree and positively related to cumulative yield (Obouayeba et al, 2011;Lacote et al, 2014). Thanh et al (1996) reported that cumulative yield of d3 was only 93% of that obtained from d2 tapping system.…”

Section: Rubber Yield Performancesupporting

confidence: 75%

Performances of low frequency rubber tapping system with rainguard in high rainfall area in Myanmar

Zaw¹,

Sdoodee²,

Lacote³

2017

Aust J Crop Sci

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In Myanmar, natural rubber (Hevea brasiliensis) is mainly grown in the southern part of the country, where the rainfall is too high leading to suspension of tapping in the rainy season and intensive tapping after the rainy season. Rubber farmers face problems of uneven distribution of tapping days, low tapper productivity, high tapping cost, and shorter economical lifespan of the trees. Hence, a study was carried out to address the problems by conducting an on-farm experiment to assess performances of low frequency rubber tapping system (LFRTS) with rainguard in the area. Five treatments: (T 1 ) S/2 d2 (no tapping in the rainy season); (T 2 ) S/2 2d3 (no tapping in the rainy season); (T 3 ) S/2 (RG) d2 (tapping with rainguard in the rainy season); (T 4 ) S/2 d3 ET2.5% Pa (1) 3/y (m) (tapping without rainguard in the rainy season); (T 5 ) S/2 (RG) d3 ET2.5% Pa (1) 3/y (m) (tapping with rainguard in the rainy season) were evaluated. The cumulative yield in kilogram per tree of T 5 during the study period was comparable to that of T 1 , while its daily yield in gram per tapping per tree was 23% and 30% higher than that of T 1 and T 2 , respectively. Bark consumption of T 5 was 16% and 39% lower than that of T 1 and T 2, respectively. T 5 needed only 67% of tapper requirement by d2 frequency tapping. Tapping costs of T 5 were 17% lower than those of conventional tapping system, T 1. The study suggested that LFRTS with rainguard could be implemented to address the problems of the farmers in the area.Keywords: bark consumption; low frequency rubber tapping system; rainguard; tapping cost; tapper productivity; tapper requirement. Abbreviations: 2d3_ two tappings in three days; BO-2_ virgin bark at second basal panel; d2_ alternate tapping; d3_third daily tapping; ET_ethephon stimulation; LFRTS_ low frequency rubber tapping system; Pa_ panel application; RG_rainguard; S/2_ half spiral cut (length of tapping cut)

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Section: Rubber Yield Performancesupporting

confidence: 75%

Performances of low frequency rubber tapping system with rainguard in high rainfall area in Myanmar

Zaw¹,

Sdoodee²,

Lacote³

2017

Aust J Crop Sci

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“…More importantly, there was no indication of increased incidence of TPD affected trees in LIH systems, reconfirming the safety of stimulation protocols. In general, incidence of TPD tends to decline with the reduction in harvesting intensity (Obouayeba et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Replacing traditional half spiral cut by a quarter cut with Ethephon; a simple approach to solve current issues related to latex harvesting in rubber industry

Rodrigo

Kudaligama

Fernando

et al. 2012

J. Natn. Sci. Foundation Sri Lanka

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Harvesting rubber latex is rather labour intensive since trees are traditionally tapped half spiral, once in two days (S/2 d2) resulting in unnecessary waste of tree bark. High cost of production, shortage of harvesters and reduced economic lifespan are the key issues in rubber plantations related to harvesting. Low intensity harvesting (LIH) systems (i.e. either reduction in harvesting frequency and/or tapping cut length) of rubber appear to be a practical solution to these issues by bringing down the labour requirement and the cost of production. Of these, only the reduction in harvesting frequency has been tried in Sri Lanka. Hence, the present study was aimed to develop new LIH systems with shorter tapping cuts. This study comprised two stage stimulant (Ethephon) based field trials to evaluate a wide range of LIH systems. The overall yield given by traditional S/2 d2 was used as the standard in evaluation. Stimulation protocols of different harvesting systems were adjusted from time to time to achieve this standard. In addition, growth and physiological parameters of latex and the financial viability of the principal system were also assessed. Among the LIH systems tested, S/4 d3 (tapping quarter spiral once in three days) was successful in providing benefits, such as increase in both overall profits and harvesters' income and reduction in harvesting cost and overall cost of production. The overall bark consumption was also greatly reduced. Above all, it allows tapping the virgin bark of base panels for over 24 years. Popularization of this approach is proposed after large scale commercial testing.

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“…The Tapping Panel Dryness (TPD) syndrome is characterized by the partial or, ultimately, total stoppage of latex flow upon tapping, due to in situ coagulation of rubber particles. Numerous studies have shown that TPD appears to be a physiological disorder resulting from excessive recurrent tapping and overstimulation by ethylene [ 6 , 7 , 8 , 10 , 11 ]. The term TPD is related to two types of physiological symptoms.…”

Section: Introductionmentioning

confidence: 99%

Involvement of Ethylene in the Latex Metabolism and Tapping Panel Dryness of Hevea brasiliensis

Putranto

Herlinawati²,

Rio

et al. 2015

IJMS

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Ethephon, an ethylene releaser, is used to stimulate latex production in Hevea brasiliensis. Ethylene induces many functions in latex cells including the production of reactive oxygen species (ROS). The accumulation of ROS is responsible for the coagulation of rubber particles in latex cells, resulting in the partial or complete stoppage of latex flow. This study set out to assess biochemical and histological changes as well as changes in gene expression in latex and phloem tissues from trees grown under various harvesting systems. The Tapping Panel Dryness (TPD) susceptibility of Hevea clones was found to be related to some biochemical parameters, such as low sucrose and high inorganic phosphorus contents. A high tapping frequency and ethephon stimulation induced early TPD occurrence in a high latex metabolism clone and late occurrence in a low latex metabolism clone. TPD-affected trees had smaller number of laticifer vessels compared to healthy trees, suggesting a modification of cambial activity. The differential transcript abundance was observed for twenty-seven candidate genes related to TPD occurrence in latex and phloem tissues for ROS-scavenging, ethylene biosynthesis and signalling genes. The predicted function for some Ethylene Response Factor genes suggested that these candidate genes should play an important role in regulating susceptibility to TPD.

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Relationship between tapping intensity and tapping panel dryness susceptibility of some clones of Hevea brasiliensis in Southwestern Côte d’Ivoire

Cited by 8 publications

References 1 publication

Performances of low frequency rubber tapping system with rainguard in high rainfall area in Myanmar

Performances of low frequency rubber tapping system with rainguard in high rainfall area in Myanmar

Replacing traditional half spiral cut by a quarter cut with Ethephon; a simple approach to solve current issues related to latex harvesting in rubber industry

Involvement of Ethylene in the Latex Metabolism and Tapping Panel Dryness of Hevea brasiliensis

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