Effect of Late Upward Tapping on the Productivity of the Metabolically Active Hevea brasiliensis Clone PB 260 in Southwestern Cote d'Ivoire

In order to evaluate the improvement of rubber productivity of rubber trees by late upward tapping. A study was conducted at SCASO (Société Civile Agricole du Sud-Ouest) on the PB 260 clone of the active metabolic class. The experimental set-up is a Fisher block design with eight treatments and three replications. The treatments compared were bled in reverse in the eleventh year of harvest, in quarter spiral every 3, 4, 5 and 6 days, with stimulation frequencies of 6, 8, 10, 12 and 13 times a year. The parameters measured were rubber production, isodiametric growth, sensitivity to dry notching of trees and physiological profile. The results show that the different latex harvesting technologies improve the rubber productivity of PB 260 (5469 kg.ha-1.yr-1) with a low dry-nut rate (1.2%) and satisfactory radial vegetative growth (3.9cm.yr-1). The physiological profile of the trees is balanced, but the treatments significantly influenced the different parameters except sucrose. Trees bled in S/4U d3 gave better results due to their high yield with an acceptable dry notch rate. Late reverse tapping is therefore a good latex harvesting technology for improving rubber productivity after down tapping.

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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

Journal of Experimental Agriculture International ◽

10.9734/jeai/2021/v43i230650 ◽

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.

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Influence of soil preparation method on root and vegetative growth of rubber tree (Hevea brasiliensis) in the southwest Côte d’Ivoire

Soil and Tillage Research ◽

10.1016/s0167-1987(00)00174-4 ◽

2001 ◽

Vol 59 (1-2) ◽

pp. 3-11 ◽

Cited By ~ 2

Author(s):

Goué Bernard Dea ◽

Assiri Alexis Assiri ◽

Oulai Raymond Gabla ◽

Daniel Boa

Keyword(s):

Cote D'ivoire ◽

Hevea Brasiliensis ◽

Vegetative Growth ◽

Côte D’Ivoire ◽

Preparation Method ◽

Rubber Tree ◽

Cote D’Ivoire ◽

Côte D'ivoire ◽

Soil Preparation

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Restoration of the potentialities of a degraded ferralsol using cocoa bean teguments in Ahoue (South East, Côte d’ivoire)

Asian Journal of Agriculture and Rural Development ◽

10.18488/journal.1005/2017.7.6/1005.6.120.130 ◽

2018 ◽

Vol 7 (6) ◽

pp. 120-130

Author(s):

Kouadio Koffi Patrice ◽

Bongoua-Devisme Affi Jeanne ◽

Yoboué Kouadio Emile ◽

Touré Nantarie ◽

Beugré Christian Moise ◽

...

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Block Design ◽

Chemical Properties ◽

Cocoa Bean ◽

Cote D’Ivoire ◽

Environmental Preservation ◽

Côte D'ivoire ◽

Experimental Block ◽

Set Up

This study consists of using the cocoa bean teguments as a means of sustainable production growth and environmental preservation. It aims to characterize the effects of the teguments on the chemical properties of a Ferralsol in Ahoué (Côte d'Ivoire). In an experimental block design of Fisher, three treatments of Cocoa bean teguments: T1 (10 t.ha-1), T2 (15 t.ha-1), T3 (20 t.ha-1) and one Control T0 have been set up with four repetitions. The main results show that the contribution of cocoa bean teguments has a positive effect on all the characteristics studied. The values obtained of the pH of the T0 and the T1, T2, T3 indicates, respectively 4.2; 5.4; 5.5 and 5.8. As regards the contents of the CEC, the values obtained give: 2.32; 7.2; 11.44 and 12.5 cmol.kg-1, respectively, for T0, T1, T2 and T3 treatments. As for the organic matter, the contents obtained indicate the following values: T0 = 12.56 g.kg-1; T1 = 26.49 g.kg-1; T2 = 35.09 g.kg-1 and T3 = 38.08 g.kg-1. The data corresponding to the sum of the captions oscillated between 4.5 and 10.5 cmol.kg-1 according to the treatments.

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Evolution of the Rate of Live and Tapped Trees of Hevea brasiliensis Clones, Muell. Arg. the First 15 Years of Plantation Establishment

Journal of Scientific Research and Reports ◽

10.9734/jsrr/2021/v27i1130468 ◽

2021 ◽

pp. 174-187

Author(s):

Diarrassouba Moussa ◽

Soumahin Eric Francis ◽

Konan Djézou ◽

Kouakou N’ Guessan Kan Pulchérie ◽

Moro Affia Perpetue ◽

...

Keyword(s):

Experimental Design ◽

Metabolic Activity ◽

Cote D'ivoire ◽

Hevea Brasiliensis ◽

Côte D’Ivoire ◽

Block Design ◽

Plantation Establishment ◽

Cote D’Ivoire ◽

Activity Class ◽

Factors Influencing

The density of tapped rubber trees in a plantation is a determining parameter of its productivity. It is related to the number of trees planted per hectare, the evolution of which can be influenced by several factors that act on the trees from the year of establishment to the time of tapping. To this end, a study to determine the evolution of the rate of live trees and tapped trees of eight rubber clones during the first fifteen years of establishment was carried out in southwestern Côte d'Ivoire. At opening, rubber trees planted at 510 trees/ha (7 m x 2.80 m) were bled in a descending half-spiral at different tapping and stimulation frequencies. The experimental design was a Fisher block design with 6 treatments (d2, d3/4y, d4/4y, d4/8y, d5/8y, d6/10y) and 3 replications. The results revealed that the rate of live trees and tapped trees was not influenced by either clone or latex harvesting treatment. The rate of live trees decreased progressively from the immature phase of the plantation (94.71 ± 1.34%) to the end of the downward tapping (91.55 ± 0.67%). The rate of tapped trees increases from the time of planting (69.51 ± 8.03%), over the years (92.00 ± 1.39%) until it equals the rate of live trees (92.00 ± 1.08%) before gradually decreasing to 88 ± 3.78%. It should be noted that the factors influencing the evolution of the rates of live and taped trees caused less damage to the rubber trees. And this influence is not dependent on clone, metabolic activity class and latex harvesting system.

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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

Journal of Advances in Biology & Biotechnology ◽

10.9734/jabb/2021/v24i530216 ◽

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.

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Effect of different preceding crops and land preparation methods on the agrophysiological and health parameters of Hevea brasiliensis Muell. Arg clone GT 1 in southwestern Côte d'Ivoire

European Scientific Journal ESJ ◽

10.19044/esj.2018.v14n33p369 ◽

2018 ◽

Vol 14 (33) ◽

pp. 369

Author(s):

Ballo Esperence Kouadio ◽

Soumahin Eric Francis ◽

Ballo Koffi Celestin ◽

Elabo Agnyman Eliathe Angeline ◽

Adou Bini Yao Christophe ◽

...

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Preparation Method ◽

Physiological State ◽

Cote D’Ivoire ◽

Physiological Profile ◽

Land Preparation ◽

Preceding Crop ◽

Côte D'ivoire ◽

Tapping Panel Dryness

Land preparation method and preceding crops affect the evolution of rubber trees. Its ignorance and/or poor execution do not allow the efficient development of the agronomic and economic potentialities of plantations. In order to remove this constraint, a study was undertaken in southwestern Côte d'Ivoire. The rubber trees were planted at 510 trees/ha according to a Fisherblock experimental design, of six preceding crop treatments with three repetitions. Only one latex harvesting system was applied (S/2 d/4 6d/7 ET 2.5% Pa 1 (1) 6/y). The parameters measured were rubber yield, annual average girth increment, physiological profile, sensitivity to tapping panel dryness and sensitivity to root rot caused by the genus Fomes. The results showed that the rate of rubber trees found in the plots was good (90.73± 0.47 %) and had varied with land preparation method depending on the preceding crops. Vegetative growth at tapping (2.05±1.36 cm.year -1 ), and average rubber yield (2053±179 kg.ha-1 .year -1 ) and the rate of tree loss due to the genus Fomes (8.33±0.42%) were influenced by land preparation method. The good productivity, the good physiological state of the rubber trees were characterized by a well balanced physiological profile and a tapping panel dryness rate (3.60 ± 1.74%), independently of treatments. The Agroeconomic results showed that mechanically prepared fallow (813641 FCFA.ha-1 .year -1 ) was the best preceding crop and land preparation method. This technical result has two main interests for the national rubber-growing industry, since it actively participates in the national policy for fighting against deforestation but also contributes to the establishment of a secondary forest by the attributes of the rubber-growing plant cover.

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DYNAMICS OF FRUIT FLIES POPULATIONS IN TWO MANGO PRODUCTION ZONES (KORHOGO AND FERKÉ) IN NORTHERN CÔTE D’IVOIRE

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i7.2019.759 ◽

2019 ◽

Vol 7 (7) ◽

pp. 256-264

Author(s):

Minhibo Magloire Yves ◽

Akpesse Akpa Alexandre Moïse ◽

Coulibaly Tenon ◽

Koua K Hervé ◽

Coulibaly Adama

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Diversity Indices ◽

Fruit Flies ◽

Shannon Index ◽

Bactrocera Dorsalis ◽

Cote D’Ivoire ◽

Côte D'ivoire ◽

Set Up ◽

Study Sites

Fruit flies are a major constraint to the production and export of mangoes by causing the rot of mangoes. The objective of this work is to follow the fluctuation of population of flies in the northern part of Côte d'Ivoire between May 2015 and October 2016. A network of trapping flies using food baits (the Torula and Ceratrap) and sexual attractants (Methyl Eugenol and Trimedlure) were set up in Korhogo and Ferké mango orchards with the forest Diabaté Kamonon and the forest Petit Clerc as reference area. During trapping, 11 species of fruit flies were identified at all study sites. Among these species, Bactrocera dorsalis and Ceratitis cosyra, were the most abundant in the area. In general, diversity indices were low. The Ferké’s Forest has the highest Shannon index (H = 1.20). This index was higher than the index found in Ferke's orchards (0.9398). At Korhogo the Shannon index in orchards (H = 0.84) is higher than in the forest (H = 0.41). It has been observed that the genus Bactrocera swarmed on mango orchards when precipitation was plentiful. While the genus Cerartitis only appeared when precipitation was low. In addition, knowledge of the ecology and fluctuation of fruit flies, will allow to develop a site monitoring device through a trapping system with sexual and food attractants.

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