[ Etude comparative de trois techniques de lutte contre le chancre linéaire chez le Quinquina (Cinchona Legderiana) à la Platalmu à Kagheri en territoire de Lubero ]
Volume 37, Issue 4, October 2022, Pages 950–960
Paluku Kolongo Léon1
1 Institut supérieur d’Etudes agronomiques, Vétérinaires et Forestières de Butembo, Nord Kivu, RD Congo
Original language: French
Copyright © 2022 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Linear canker is one of the diseases that attack cinchona plants a lot in the Territory of Lubero / North Kivu / DR Congo. It significantly reduces the productivity of its bark. In the fight against this attack, some farmers sterilize the soil with hot water, others warm it in a barrel. There are some who use Ridomil to treat the soil (earth). The objective of this study is to evaluate the effectiveness of these three techniques in the fight against Phytophthora cinnamoni in the Kagheri region, and to deduce the procedure that responds best in the fight against this attack. A treatment device for four repetitions was adopted. 16 plots arranged over 40.96m2 were set up. Data analyzes show that the attack rate at disease onset was 45% for T0, 17.5% for T2, and 6% and 1.2% for T1 and T3, respectively. The linear chancre rapidly progressed to T0 the first month of attack, then to 85% the third month, finally to 100% in the fourth; all the plants were attacked following climatic conditions characterized by heavy rains (humidity). While sterilization with ridomil was disappointing with a result of 17.5% the first month and 41% the last month. However, T1 and T3 were effective, with successively 6% and 1.2% of the onset of the disease at the beginning as well as at the end of the observations. The analysis of variance demonstrates that there is a significant difference between the blocks either Fcal a > Ftab with 4.61 > 3.86 at the 5% threshold, but without significant difference between the treatments at the same threshold either Fcal (b) < Ftab; 1.97 < 3.86 and between the other parameters with H0 accepted. It is appropriate to use the techniques of sterilization of the soil in the barrel and by hot water in order to increase the bark yield of cinchona.
Author Keywords: Control techniques, Linear canker, Cinchona, Kagheri.
Volume 37, Issue 4, October 2022, Pages 950–960
Paluku Kolongo Léon1
1 Institut supérieur d’Etudes agronomiques, Vétérinaires et Forestières de Butembo, Nord Kivu, RD Congo
Original language: French
Copyright © 2022 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Linear canker is one of the diseases that attack cinchona plants a lot in the Territory of Lubero / North Kivu / DR Congo. It significantly reduces the productivity of its bark. In the fight against this attack, some farmers sterilize the soil with hot water, others warm it in a barrel. There are some who use Ridomil to treat the soil (earth). The objective of this study is to evaluate the effectiveness of these three techniques in the fight against Phytophthora cinnamoni in the Kagheri region, and to deduce the procedure that responds best in the fight against this attack. A treatment device for four repetitions was adopted. 16 plots arranged over 40.96m2 were set up. Data analyzes show that the attack rate at disease onset was 45% for T0, 17.5% for T2, and 6% and 1.2% for T1 and T3, respectively. The linear chancre rapidly progressed to T0 the first month of attack, then to 85% the third month, finally to 100% in the fourth; all the plants were attacked following climatic conditions characterized by heavy rains (humidity). While sterilization with ridomil was disappointing with a result of 17.5% the first month and 41% the last month. However, T1 and T3 were effective, with successively 6% and 1.2% of the onset of the disease at the beginning as well as at the end of the observations. The analysis of variance demonstrates that there is a significant difference between the blocks either Fcal a > Ftab with 4.61 > 3.86 at the 5% threshold, but without significant difference between the treatments at the same threshold either Fcal (b) < Ftab; 1.97 < 3.86 and between the other parameters with H0 accepted. It is appropriate to use the techniques of sterilization of the soil in the barrel and by hot water in order to increase the bark yield of cinchona.
Author Keywords: Control techniques, Linear canker, Cinchona, Kagheri.
Abstract: (french)
Le chancre linéaire est l’une des maladies qui attaquent beaucoup les plants du quinquina en Territoire de Lubero/ Nord- Kivu /RD Congo. Elle réduit sensiblement la productivité de son écorce. Dans lutte contre cette attaque, certains agriculteurs stérilisent le sol avec l’eau chaude, d’autres le réchauffent dans un fût. Il y en a qui utilisent le Ridomil pour traitement le sol (terre). L’objectif de cette étude est d’évaluer l’efficacité de ces trois techniques de lutte contre le Phytophtora cinnamoni en région de Kagheri, et en déduire la procédure qui répond mieux dans la lutte contre cette attaque. Un dispositif de traitement pour quatre répétitions a été adopté. 16 parcelles disposées sur 40,96m2 étaient mises en place. Les analyses des données montrent que le taux d’attaque à l’apparition de la maladie était de 45 % pour le T0, de 17,5 % pour le T2 et de 6 % et 1,2 % respectivement pour le T1 et le T3. Le chancre linéaire a rapidement évolué sur T0 le premier mois d’attaque, puis à 85 % le troisième mois, enfin à 100 % au quatrième; tous les pieds étaient attaqués suite aux conditions climatiques caractérisées par des pluies abondantes (humidité). Alors que la stérilisation au ridomil s’est montrée décevant avec un résultat de 17,5 % le premier mois et à 41 % le dernier mois. Toutefois, T1 et T3 ont été efficaces, avec successivement 6 % et 1,2 % de l’apparition de la maladie au début ainsi qu’à la fin des observations. L’analyse de la variance démontre qu’il existe une différence significative entre les blocs soit Fcal a > Ftab avec 4,61 > 3,86 au seuil de 5 %, mais sans différence significative entre les traitements au même seuil soit Fcal (b) < Ftab; 1,97 < 3,86 et entre les autres paramètres avec H0 accepté. Il sied d’utiliser les techniques de stérilisation du sol dans le fût et par l’eau chaude afin d’augmenter le rendement en écorce du quinquina.
Author Keywords: Techniques de lutte, Chancre lineaire, Quinquina, Kagheri.
How to Cite this Article
Paluku Kolongo Léon, “Comparative study of three control techniques against linear canker in Cinchona (Cinchona Legderiana) at Platalmu in Kagheri in Lubero territory,” International Journal of Innovation and Applied Studies, vol. 37, no. 4, pp. 950–960, October 2022.
