Effectiveness Of Aluminum-Fosetyl In The Control Of Early Nutfall Of Coconut Tree Due To &lt;i&gt;Phytophthora katsurae&lt;/i&gt; (Pythiaceae)

Pohe, J; Dongo, BK; N'Goran, N

doi:10.4314/aga.v15i3.1633

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Il occasionne des pertes de récoltes supérieures à 30% et des dégâts pouvant entrainer la mort de l'arbre Thevenin et al, 1995). Pour lutter contre cette maladie, des méthodes prophylactiques, chimiques et génétiques (Bujung, 1990 ;Pohé et al, 2003 ;Mario et al, 2007) ont été proposées.…”

Section: Introductionunclassified

Action de l’acide phosphoreux in vitro sur Phytophthora katsurae (Pythiaceae), parasite du cocotier en Côte d’Ivoire

N'goran¹,

Allou²,

Yao³

et al. 2011

International Journal of Biological and Chemical Sciences

View full text Add to dashboard Cite

RESUME L'action in vitro de l'acide phosphoreux sur quatre souches de Phytophthora katsurae provenant de trois régions Sud de production du cocotier en Côte d'Ivoire a été évaluée. L'étude fongitoxique de l'acide phosphoreux et la capacité de redéveloppement des souches ont été respectivement réalisées sur milieu Ribeiro modifié, amendé avec les concentrations 15, 20, 25, 30, 40 et 50 µg/ml d'acide phosphoreux et avec 15 et 50 µg/ml du même acide. Les croissances mycéliennes sur milieux amendés à l'acide phosphoreux ont été comparées aux croissances des champignons sur milieux Ribeiro ne contenant pas de l'acide phosphoreux. L'activité fongitoxique de l'acide phosphoreux s'est traduite par des taux d'inhibition compris entre 36,45% et 74,64%. Les souches du Sud Comoé issues d'une plantation villageoise de Samo et d'une plantation industrielle CAIMPEX, sont plus sensibles à l'acide, contrairement aux souches de Marc Delorme et Fresco. Les essais réalisés ont montré également que in vitro, les souches sont capables de se redévelopper à l'absence du fongicide. Cette étude a mis en évidence une activité fongistatique de l'acide phosphoreux. Ces différents comportements pourraient permettre l'optimisation de la lutte chimique dans toutes les zones de production de la Côte d'Ivoire.

show abstract

Section: Introductionunclassified

Action de l’acide phosphoreux in vitro sur Phytophthora katsurae (Pythiaceae), parasite du cocotier en Côte d’Ivoire

N'goran¹,

Allou²,

Yao³

et al. 2011

International Journal of Biological and Chemical Sciences

View full text Add to dashboard Cite

show abstract

“…Unfortunately, they are increasingly affected by known pathogens and new or previously unrecognized fungal and fastidious bacterial pathogens (Downer et al 2009;Elliott 2009). For two groups of lethal pathogens, phytoplasmas and Phytophthora spp., preventive disease management with trunk-injected chemicals is well-documented, and information about the chemical uptake, movement, and persistence has been determined (McCoy 1974;McCoy 1976;DeFranqueville and Renard 1989;Thévenin et al 1995;Pohe et al 2003;Yu et al 2015). This is not the case with the true fungal pathogens, such as the Fusarium wilt pathogens, or the rachis and petiole blight pathogens.…”

mentioning

confidence: 99%

“…Likewise, it has been determined that Phytophthora bud rot can be prevented by trunk injection of phosphite compounds (DeFranqueville and Renard 1989;Thévenin et al 1995;Pohe et al 2003), but uptake, movement, and persistence of phosphite in palms had not been examined until recently. Yu et al (2015) determined that the likely reason phosphite injections are effective against Phytophthora bud rot is because the phosphite level continued to increase over time in the youngest, unopened leaf, the initial target site of the pathogen, and persisted in this tissue for at least one year.…”

mentioning

confidence: 99%

Uptake, Movement, and Persistence of Fungicides in Mature Coconut Palms in Florida, U.S.

Elliott¹,

Broschat²

2017

AUF

View full text Add to dashboard Cite

Palms are arborescent monocotyledons, with a vascular system different from eudicotyledonous trees. Compared to broadleaf trees, very little is known about the uptake, movement and persistence of systemic fungicides into the palm canopy. In this study, conducted in 2010 and 2012, four systemic fungicides were examined in coconut palms (Cocos nucifera) in Florida, U.S., using three different application methods. A bioassay method was used to detect the fungicides every four to five weeks in palm rachises located throughout the canopy. Thiophanate methyl, which can only be applied as a soil drench, was never detected. The same was true when propiconazole and thiabendazole were applied as soil drenches. Tebuconazole, applied via infusion, was also never detected, but this appeared to be due to formulation issues. Propiconazole was detected in only two of four palms in 2010, when applied via infusion. The labeled rate had increased by 2012, and when this new rate was applied via pressure injection, the fungicide was detected in all four replicate palms. Thiabendazole, when applied via infusion or pressure injection, was detected in all four replicate palms in both years. Propiconazole and thiabendazole persisted uniformly in the canopy for at least eight weeks after application, but amounts tapered off after that time. Neither fungicide was detected in any portion of the canopy after 28 weeks. Both fungicides were detected in leaves that emerged after their application. This suggests that these fungicides may be useful for controlling some canopy diseases.

show abstract

Components of coconut fruit susceptibility to Phytophthora katsurae (Pythiaceae) in Côte d’Ivoire

Pohe¹,

Dongo²,

Agneroh³

2012

Int. J. Bio. Chem. Sci

View full text Add to dashboard Cite

The present study was to evaluate the susceptibility of coconut fruit to Phytophthora katsurae (Ko and Chang) according to their age and the position of lesions. The infection rates of nuts under natural conditions and by inoculation techniques on wounds and deposition of inoculum on the pericarp were compared. Under natural conditions, immature adult nuts between 8 and 11 months old are the most susceptible stage to infection by P. katsurae. The rounder part is the most receptive site. The proximal part is most liable to attack in young 4-8 months old fruits, which are less numerous in the susceptible host stage. Ripe nuts of at least 12 months old are totally immune to infection. The distal part of all categories of nuts is not invaded by the lesions. There is a highly significant difference between the susceptibility of the proximal zone of young and adult wounded nuts at 1% significance level. A non responsiveness of the distal zone of the young nuts was observed on nuts not wounded. Based on artificial inoculations on fruit of different ages, the resistance mechanism in the fruit seems to be much more physically linked to nut anatomy than chemically.

show abstract

Effectiveness Of Aluminum-Fosetyl In The Control Of Early Nutfall Of Coconut Tree Due To <i>Phytophthora katsurae</i> (Pythiaceae)

Cited by 3 publications

References 0 publications

Action de l’acide phosphoreux <i>in vitro</i> sur <i>Phytophthora katsurae</i> (Pythiaceae), parasite du cocotier en Côte d’Ivoire

Action de l’acide phosphoreux <i>in vitro</i> sur <i>Phytophthora katsurae</i> (Pythiaceae), parasite du cocotier en Côte d’Ivoire

Uptake, Movement, and Persistence of Fungicides in Mature Coconut Palms in Florida, U.S.

Components of coconut fruit susceptibility to <em>Phytophthora katsurae</em> (Pythiaceae) in Côte d’Ivoire

Contact Info

Product

Resources

About