scholarly journals Latex Harvesting Technologies Adapted to Hevea brasiliensis Muell Clones GT 1; RRIC 100 and BPM 24 Arg. (Euphorbiaceae) belonging to the Moderate Metabolism Class in the Socio-economic Context of Côte d'Ivoire

2021 ◽  
Vol 2 (6) ◽  
pp. 10-19
Author(s):  
Moussa Diarrassouba ◽  
Souleymane Sanogo ◽  
Brahima Camara ◽  
N’guessan Samuel Obouayeba
Keyword(s):  
Hevea Brasiliensis ◽  
Plant Material ◽  
Vegetative State ◽  
Economic Life ◽  
Rubber Production ◽  
Economic Context ◽  
Production Analysis ◽  
Negative Effect ◽  
Tapping Panel Dryness ◽  
Plantation Yield

Improving the productivity of rubber trees has always been a major concern for rubber farmers. The majority of growers opt for overexploitation of the trees. This disturbs the physiological balance of the rubber trees, which leads to the recrudescence of tapping panel dryness and rather to a drop in production. To solve this problem, the present study proposes to define a latex harvesting technology (or technologies) for the moderate metabolism clone class that will allow the improvement of plantation yield and the increase of the economic life of the trees. To achieve this, the GT 1, RRIC 100 and BPM 24 clones of the moderate metabolism class were used as plant material. The results showed that the reduction in tapping frequency had no negative effect on the vegetative state of the trees. This reduction was compensated by a high number of annual stimulations, which resulted in high dry rubber production. Analysis of dry rubber production, radial rubber growth and tapping panel dryness rate indicates that the moderate metabolic class clones performed better with the latex harvesting technologies S/2 d3 6d/7 ET2.5% Pa1(1) 6/y; S/2 d4 6d/7 ET2.5% Pa1(1) 6/y and S/2 d5 6d/7 ET2.5% Pa1(1) 1.

scholarly journals Quantitative Assessment of the Agro-physiological Advantages of Upward Tapping in Relation to the Downward Tapping of the GT 1 and PB 260 Rubber Clones [Hevea brasiliensis, Muell. arg. (Euphorbiaceae)] in Southwest Côte d'Ivoire

2021 ◽  
pp. 94-104
Author(s):  
A. P. Moro ◽  
B. Y. C. Adou ◽  
M. Diarrassouba ◽  
D. Konan ◽  
E. F. Soumahin ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Hevea Brasiliensis ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Physiological Profile ◽  
Rubber Production ◽  
Côte D'ivoire ◽  
Productivity Gain ◽  
Harvesting Systems ◽  
Tapping Panel Dryness

The downward tapping on virgin bark of the lower panel (BO) is immediately followed by the upward tapping on virgin bark of the upper panel (HO), consecutively. To determine the agro-physiological advantages of one tapping over another, a study of the downward and upward tapping of the GT 1 and PB 260 clones of Hevea brasiliensis was carried out in southwestern Côte d'Ivoire. For this purpose, the rubber trees were tapped in a downward half-spiral (S/2) at the opening for nine consecutive years, followed by upward quarter-spiral tapping (S/4U) for four consecutive years. The agronomic parameters (rubber production and vegetative growth), tapping panel dryness and the latex micro-diagnosis, were evaluated. For GT 1 clone, the transition from the downward tapping panels to the upward tapping panels resulted rubber productivity gain of 35%. Meanwhile for PB 260, rubber productivity gain was 37%. Regardless of the clone and tapping direction, the higher the rubber productivity of a respective tapping panel, the lower the isodiametric growth of the tree trunk was recorded. Latex harvesting systems, and clone’s combination, did not influence the tapping panel dryness or the physiological profile of the trees. Finally, it should be concluded that upward tapping is more productive than downward tapping, but the quantification of the gains in this rubber production depends on the clone.

scholarly journals Relationship between the Intensity of Latex Harvesting and the Tapping Panel Dryness Expression of Clone GT 1 of Hevea brasiliensis Muell Arg in South-East Côte d'Ivoire

2021 ◽  
pp. 36-45
Author(s):  
Obouayeba Samuel ◽  
Konan Djezou ◽  
Diarrassouba Moussa ◽  
Lehi Malidy Irénné ◽  
Koffi Antoine ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Hevea Brasiliensis ◽  
Côte D’Ivoire ◽  
Thiol Group ◽  
Limiting Factor ◽  
Eastern Region ◽  
Cote D’Ivoire ◽  
Rubber Production ◽  
Côte D'ivoire ◽  
Tapping Panel Dryness

Tapping panel dryness is an important limiting factor in rubber productivity of Hevea brasiliensis. In order to assess the sensitivity to this syndrome, the effect of two intensive latex harvesting technologies on moderately metabolized GT1 clone, has been studied in the South-Eastern region of Côte d'Ivoire. The rubber trees were planted according to the experimental mono-tree device, "One tree one plot design" a tree constituting a repetition, and 31 trees per treatment, selected on circumference and health status criteria. The parameters measured were rubber production, circumference increase, physiological profile and tapping panel dryness sensitivity. The results showed that induction of tapping panel dryness in latex harvesting system, S/2 d/3 6d/7 ET 10 % Pa 1 (1) 1/ w) was significantly low (0.18 ± 0,22 %) than that of the control (S d/1 6d/7 unstimulated, 1.43 ± 1.45 %). Productivity of this particular system was also good (62 ± 16.32 g.a-1.s-1) and it especially has less stress that can cause physiological fatigue, or even the notch dry. Otherwise, Rubber production, radial vegetative growth, physiological parameters of the latex and the tapping panel dryness rate were influenced by the two treatments applied to GT 1. In addition, the medium and high sucrose contents (16.5 ± 3.01%) and thiol group (0.51 ± 0.13 mmol.l-1) of the latex in the treatment (S/2 d/3 6d/7 ET 10% Pa 1 (1) 1 / w), were instrumental in the response to this stimulation. The sensitivity to the tapping panel dryness is in very close linear relation with the harvest intensity of the latex to which the GT 1 clone has been subjected. These results corroborate and confirm the moderate sensitivity to the tapping panel dryness of GT 1 clone.

scholarly journals Latex production with depolymerizing compounds of actin cytoskeleton in rubber trees

2008 ◽  
Vol 43 (2) ◽  
pp. 275-279 ◽  
Author(s):  
Gao Zheng-Quan ◽  
Meng Chun-Xiao ◽  
Ye Nai-Hao
Keyword(s):  
Actin Cytoskeleton ◽  
Potassium Iodide ◽  
Hevea Brasiliensis ◽  
Total Solid ◽  
Inorganic Phosphorus ◽  
Latrunculin A ◽  
Tapping Panel Dryness ◽  
Latex Production

The objective of this work was to assess stimulated latex flow from rubber trees (Hevea brasiliensis) with saturated macrolide (latrunculin A), 1, 5, and 10% potassium iodide in 2% methylcellulose compared with 0.3% ethylene in 2% methylcellulose (check) and 2% methylcellulose (blank). Latex output and contents of pure rubber, total solid, sucrose, inorganic phosphorus, thiol, and Mg2+ were measured. The treatments containing 1% KI or saturated macrolide increased latex yields compared to the blank with 2% methylcellulose alone. The 1% KI or saturated macrolide treatments were equal to that of 0.3% ethylene check treatment. However, 5 and 10% KI were harmful to bark of rubber trees, even caused prolonged tapping panel dryness.

scholarly journals Within-family genomic selection in rubber tree (Hevea brasiliensis) increases genetic gain for rubber production

2019 ◽  
Vol 138 ◽  
pp. 111464 ◽  
Author(s):  
David Cros ◽  
Luther Mbo-Nkoulou ◽  
Joseph Martin Bell ◽  
Jean Oum ◽  
Aurélien Masson ◽  
...  
Keyword(s):  
Genomic Selection ◽  
Genetic Gain ◽  
Hevea Brasiliensis ◽  
Rubber Tree ◽  
Rubber Production

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

2015 ◽  
Vol 16 (8) ◽  
pp. 17885-17908 ◽  
Author(s):  
Riza-Arief Putranto ◽  
Eva Herlinawati ◽  
Maryannick Rio ◽  
Julie Leclercq ◽  
Piyanuch Piyatrakul ◽  
...  
Keyword(s):  
Hevea Brasiliensis ◽  
Tapping Panel Dryness

To the Iron Age of Progress (The Image of Economic Life of the Country in Russian Poetry of the XVIII – XIX Centuries)

2020 ◽  
Vol 12 (3-2) ◽  
pp. 231-259
Author(s):  
Oleg Donskikh ◽  
◽  
◽  
Keyword(s):  
Iron Age ◽  
Golden Age ◽  
Economic Life ◽  
Social Orientation ◽  
External Observer ◽  
Economic Relations ◽  
Common Opinion ◽  
Negative Effect ◽  
Xix Century

The author presents the attitude of Russian poets of the XVIII–XIX centuries to different aspects of economic life based on their works. The poetry of the XVIII century was rigidly differentiated by genre, and it was not supposed to reflect the specifics of economic relations in general. The only exceptions were satirical works whose authors criticized, primarily from the moral side, certain aspects of everyday life, and in particular, the practice of tax collectors. Nevertheless, poets did not do without comments about the socio-economic division of society into separate groups, the significance of certain power decisions for the development of the country’s economy, and, of course, the role of money and trade in the development of society as a whole and in human lives. Some poems contain curious references to international trade, the development of which, especially in the reign of Catherine II, led some poets to hail progress and even characterize this time as a ‘Golden Age’. It is shown how the assessment of the epoch changes during the first half of the XIX century, and how the ‘Golden Age’ is transformed in common opinion into the ‘Iron Age’. The role of economic and socialist theories in the life of society is increasing. A poet of the XIX century descends from the position of an external observer watching the sinful earth and he is horrified to find himself at the mercy of money and related interests, which produce a highly negative effect on morality, subordinating all human aspirations to monetary relations and, therefore, coarsening the soul. We consider the disputes about the progress between the lyric poets and our quite straightforward Westerners. Alexander Blok sums up a certain result of the social orientation towards purely economic relations and the technological progress associated with it in the poem “Retribution”.

Sign in / Sign up

Export Citation Format

Share Document