Academic Press, San Diego, pp. Spray bordeaux mixture 1% thoroughly on the whole plant after harvest and repeat again at fruit setting. Francis C. Brentu. Phytopathology 103:1204–1208, Article  In Ghana, the disease was originally associated with Phytophythora parasitica, but details of the aetiological methods used were not provided (Leather 1959; Clerk 1974). It may also be seen if there was high flower initiation. 1999). A guide to methods and applications. If you see gummy sap leaking out of your peach , plum , cherry or apricot tree , it is probably gummosis. Gummosis can weaken a tree, but it isn't the end of the world. One sample from each of 50 sweet orange trees (cv. Forest and Horticultural Crops Research Centre-Kade, School of Agriculture, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana, Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias (IVIA), Moncada, Valencia, Spain, You can also search for this author in This disease is also known as gumming diseases of citrus. Published under a CC-BY-SA 4.0 licence. The experiment was repeated once using five plants for each of the 10 isolates studied and five other plants as controls. Under favorable conditions (high moisture and temperature) it produces large numbers of motile zoospores that can swim in water for short distances. These results were later supported by Offei et al. Typical Phytophthora-like noncaducous, papillate sporangia were observed when incubated in sterile soil extract (Fig. These morphological and cultural characteristics were similar to those described for Phytophthora citrophthora (Erwin and Ribeiro 1996). The cause of this gummosis varies. No symptoms were observed on control plants. PubMed  Mycologia 3:151–153, Grunwald NJ, Martin FN, Larsen MM, Sullivan CM, Press CM, Coffey MD, Hansen EM, Parke JL (2011) a sequence based Phytophthora identification tool. The infected bark often cracked and peeled off with disease progression. It is caused by a fungus. 2011) in the Phytophthora-ID database 2.0 (Grunwald et al. Part of Springer Nature. Retrieved September 18, 2014, from, Fawcett HS, Burger OF (1911) A gum-inducing Diplodia of peach and orange. Citrus foot rot is a disease caused by Phytophthora, an aggressive fungus that lives in the soil. © Copyright 2020 CAB International. (2002), who also induced lesions in different citrus rootstocks inoculated with L. theobromae. Control plants were treated with PDA plugs. It is caused by a fungus. Correspondence to The citrus-growing area in Ghana has expanded significantly in the last decades with 671,000 tonnes of citrus fruit produced in 2012 (FAOSTAT 2012). The recommendations in this factsheet are relevant to: Like most websites we use cookies. Gummosis instigated by Synanthedon pictipes, the lesser peachtree borer. Brentu, F.C., Vicent, A. Gummosis of citrus in Ghana caused by Phytophthora citrophthora Diplodia natalensis) as the causal agent of the disease in Kade (Assuah et al. Australasian Plant Dis. In: Innis MA, Gelfand DH, Sninsky JJ, White TJ (eds) PCR protocols. Plant Dis 95:337–342, Article  Further country-wide surveys will elucidate the role of P. citrophthora and other Phytophthora species in a gummosis of Citrus species in Ghana. Valencia-Late grafted on rough lemon grown in plastic pots (40 cm diameter × 60 cm deep) containing potting mix (sterilised soil and rice husk Boucher). Likewise, if there is gum secretion on any part of the tree, clean it off and use Bordeaux-pest as mentioned before. One isolate from each sample was selected for morphological and cultural analysis. 2008). Google Scholar, Hearn CJ, Fenton R (1970) Benomyl sprays for control of twig dieback of ‘Robinson’ tangerine. Sequences were compared with those available in the Phytophthora database 2.0 (Park et al. Moreover, before the spread of citrus tristeza virus (CTV) in Ghana (~1938–1948), control of gummosis was obtained by budding onto sour orange (C. aurantium), which is known to be highly resistant to Phytophthora (Leather 1959). Plant Dis 70:1038–1043, Leather RI (1959) Diseases of economic plants in Ghana other than cacao.

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