scholarly journals Assessment of Tolerance to Fusarium Wilt of some Traditional Accessions of Oil Palm (Alaeis guineensis Jacq.) Collected in Man, West of Cote d'Ivoire

2018 ◽  
Vol 7 (2) ◽  
pp. 77-84
Author(s):  
Kablan K.A.B. Martine ◽  
Sékou Diabaté ◽  
Konan J. Noel ◽  
Kouakou T. Hilaire ◽  
Koné Mongomaké

The oil palm (Elaeis guineensis Jacq.) genetic improvement is based on a recurrent reciprocal selection scheme, involving two groups of populations whose production components are complementary. Group A is essentially coming from Asia, while group B includes African oil palm populations. In order to increase genetic variability and to enrich the agronomic qualities of this group B, a survey was carried out in Western Côte d'Ivoire. Twelve traditional genotypes were collected in the Man area. They are known to produce a rather fluid palm oil but their behavior against Fusarium wilt was unknown. Therefore, these traditional populations were subjected to the Fusarium wilt tolerance test. One hundred and sixty (160) two-months-old seedlings of the traditional accessions were distributed in 8 completely randomized blocks and inoculated by Fusarium oxysporum f. sp. elaeidis. The appearance of external symptoms on inoculated plantlets was observed over the duration of 5 months, and internal symptoms remarked after plantlets dissection. Index of the Fusarium wilt susceptibility of each progeny was determined. A third of traditional genotypes tested (Dompleu Kp 03, Gbangbegouiné Doua 01, Gbangbegouiné Kla 01 and Gbatonguin Yod 02) proved to be highly tolerant to the wilt disease. Four traditional accessions (Bogouiné Sad 02, Dompleu Kp 01, Dimgouin Zoh 02 and Blolé Dio 05) showed low tolerance, while the last four traditional genotypes (Blolé Oul 03, Koutongouiné Iba 02, Blolé Dio 02 and Dompleu Dou 03) were sensitive to the wilt disease.

2018 ◽  
Vol 16 (5) ◽  
pp. 1-16
Author(s):  
Rosine Mihia Brou ◽  
Gbocho Serge Elvis Ekissi ◽  
Betty Meuwiah Faulet ◽  
Bedel Jean Fagbohoun ◽  
Patrice Lucien Kouamé

Author(s):  
KOUAME Konan ◽  

In Côte d’Ivoire, palm oil occupies a preponderant position in agricultural production, in the economy, as well as consumer fats. Yield remains low, even with improved plant material being popularized whose productivity is estimated at more than 25 tons/ha/year. Trials have been set up in La Mé and Ehania (South-east Côte d’Ivoire), to help improve oil palm productivity, through a comparative study of the efficiency of potassium fertilization applied according to the locality. The experiments were conducted in Fisher blocks, including 5 treatments and 4 repetitions. The treatments included 5 doses of potassium fertilizer (T1, T2, T3, T4, T5) corresponding, respectively, to 1; 1.5; 2; 2.5; 3 kg KCl/tree/year. The results showed that the rainfall recorded in the locality of Ehania was significantly higher than that of La Mé. The average annual rainfall was 2000 mm of water in Ehania against, approximately, 1700 mm of water in La Mé. The yield and its components (weight of the bunch and number of bunches) were gradually improved according to the locality of cultivation by the different doses of fertilizer applied. This improvement was significantly higher on the Ehania plantation compared to that of La Mé. This improvement was approximately 30% and 27% compared to the standard dose of 1 kg KCl/tree/year, respectively, in Ehania and La Mé. It appears that the locality intervenes in the efficiency of potassium fertilizers, in the improvement of yield and its components. Rainfall appears, as, a main factor of productivity observed on the plot of the oil palm. Strict compliance with the choices of suitable areas, combined with reasoned potassium fertilization, will allow a better expression of the production potential of new oil palm plant material, currently being popularized.


Author(s):  

Abstract A new distribution map is provided for Fusarium oxysporum f.sp.elaeidis Toovey. Hosts: Oil palm (Elaeis guineensis). Information is given on the geographical distribution in Benin, Brazil, Amazonas, Para, Cameroon, Colombia, Congo, Cote d'Ivoire, Ecuador, Ghana, Nigeria, Suriname, Zaire.


Author(s):  
Kouame Konan ◽  
Kassi Koffi Fernand Jean–Martial ◽  
Kone Boaké

In the southeastern of Côte d'Ivoire, ferralsols are characterized by poverty in exchangeable bases, especially potassium, which appears to be the predominant mineral element for oil palm cultivation.   In this study, we used improved palm cultivars treated with different rates of potassium fertilizer to determin the effect on oil palms. The experiments were conducted on the CNRA station in La Mé and PALMCI in Ehania (Côte d’Ivoire), following a system block system design comprising of five treatments and four repetitions. Treatments included 5 rates of potassium fertilizer (T1, T2, T3, T4, T5) corresponding to 1; 1.5; 2; 2.5; 3 kg of KCl/tree/year. This study indicates that the different rates of KCl applied, had influence on    all of the experimental parameters, namely: yields (TR) and its components (NR; PR and PMR). Yields on the Ehania plantation were significantly higher than those on La Mé. Yield ranged from 18.8 Tons/ha/year (T1) to 22.1 Tons/ha/year (T3) in La Mé, and from 21.2 to 25.6 tons/ha/year in Ehania. The theoretical maximum rates were 2.4 kg of KCl/tree/year in La Mé, compared to 1.9 kg/tree/year on the Ehania plantation. Therefore, these rates will be used in the future extension of potassium fertilizer, in the cultivation of oil palm, in the southeastern of Côte d'Ivoire.


2021 ◽  
Author(s):  
Matthew Cock

Abstract Writing about Zophopetes cerymica (which they considered more common) and P. laufella combined, Mariau and Morin (1974) state that attacks can be on palms of all ages, including young palms recently planted out. At this age, defoliation of the plants delays their subsequent development. Outbreaks on older trees are rarer, and the damage often less important; these attacks are generally localized at the edge of plantations. Mariau et al. (1981) add that the highest fronds are the most often damaged. Herder et al. (1994) refer to regular outbreaks of P. laufella on oil palm in southern Côte d'Ivoire. There are no more substantive reports on the impact of the feeding damage by these hesperiids.


Entomophaga ◽  
1990 ◽  
Vol 35 (3) ◽  
pp. 347-354 ◽  
Author(s):  
G. Fedière ◽  
R. Philippe ◽  
J. C. Veyrunes ◽  
P. Monsarrat

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