In vivo Expression and Evolution of Phytophthora katsurae (Pythiaceae) Symptoms on two Coconut Varieties EGD and PB 121+ after Treatment with Phosphorous Acid in Southern Côte d’Ivoire

Autor:	Gogbeu Seu Jonathan, Kouassi Rene Allou, Ngoran Beranger, Ake Severin, Kouassi Akossoua Faustine, Ochou Germaine Elisabeth Cynthia
Rok vydání:	2020
Předmět:	biology Inoculation food and beverages biology.organism_classification Pythiaceae Phytophthora katsurae Persistence (computer science) Fungicide chemistry.chemical_compound Horticulture chemistry In vivo Cultivar Phosphorous acid
Zdroj:	International Journal of Sciences. 9:31-44
ISSN:	2305-3925 2410-4477
Popis:	This study was initiated to optimize chemical control against Phytophthora katsurae on coconut trees with different concentrations of the fungicide phosphorous acid. In vivo, different concentrations of phosphorous acid [2.8 g (TA), 5.6 g (TB), and 11.2 g (TC) of active ingredient (a.i.)] dissolved in water, were injected into the stipes of the coconut varieties Equatorial Green Dwarf (EGD) and the hybrid PB 121+ cultivars in comparison with the same untreated cultivars. Soft and brutal inoculation, a strain of Phytophthora katsurae from naturally infected nuts was used to follow its behavior on the nuts of these cultivars treated with phosphorous acid or not. As a result, external and internal symptoms on nuts evolved according to the concentrations of acid received. 11.2 g (TC) of a.i of phosphorous acid provided protection beyond 12 months with good inhibition of pathogen growth, as opposed to 2.8 g (TA) and 5.6 g (TB) of a.i. fluctuated between 3 and 9 months depending on the varieties. This study showed a persistence of phosphorous acid in coconut tissues at high concentration in the control of Phytophthora katsurae.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::59fed7e82925f04541e883f05df2c828 https://doi.org/10.18483/ijsci.2371 Zobrazit plný text záznamu