Physiological studies on lasiodiplodia theobromae and. This fungus attacks more than 280 species of plants in different parts of the world domsch et al. It is a common post harvest fungus disease of citrus known as stemend rot. Lasiodiplodia theobromae, moniliophthora roreri y phytophthora spp. Detailed coverage of invasive species threatening livelihoods and the environment worldwide. On the basis of morphological and cultural characters as well as phylogenetic analysis of the internal transcribed spacer region its, and part of the translation elongation factor 1. Identification and pathogenicity of lasiodiplodia theobromae. Evaluation of bioagents to control lasiodiplodia theobromae pat. Dieback due to lasiodiplodia theobromae, a new constraint to cocoa production in cameroon.
Conidias inmaduras hialinas y unicelulares y maduras oscuras y bicelulares 106 figura 52. Three strains of lasiodiplodia theobromae were the most promising. First report of branch dieback of cashew caused by lasiodiplodia theobromae in brazil. In hawaii, the only other known host of this fungus is cacao theobroma cacao. Oct 23, 2014 on the basis of morphological and cultural characters as well as phylogenetic analysis of the internal transcribed spacer region its, and part of the translation elongation factor 1. Pdf dieback due to lasiodiplodia theobromae, a new.
The role of the fungus as a primary pathogen causing dieback of cacao is questionable turner, 1967 but its rotting ability is an admitted serious hazard during storage of fruits and yams. Muerte regresiva del mango por lasiodiplodia theobromae. This is, however, the first report of a damaging dieback and. Lasiodiplodia theobromae is a plant pathogen with a very wide host range. It was microscopically identified on the basis of cultural and morphological characters. As disease agent, pathogen is encountered in its anamorph state, named as lasiodiplodia. Twentynine and 15 cacao genotypes were screened in the laboratory and the greenhouse, respectively, for resistance to isolates of fusarium decemcellulare and lasiodiplodia theobromae at imperial college londons biological sciences campus, uk. It causes rotting and dieback in most species it infects. Control swabs with sterile water did not produce symptoms.
It also infects biancaea sappan, a species of flowering tree also known as sappanwood. Oct 12, 2019 neotermes injurious to living guava tree, with notes on other amazonian termites. Pages in category cacao diseases the following 20 pages are in this category, out of 20 total. The conidia of botryodiplodia theobromae are initially hyaline and nonseptate and may be released from pycnidia in this condition. Lasiodiplodia theobromae in citrus fruit diplodia stemend. Physiological studies on lasiodiplodia theobromae and fusarium solani 37 statistically different at continuous light and continuous darkness. Evaluation of jasmonic acid production by lasiodiplodia theobromae under submerged fermentation kavitha mary jackson, marimuthu ponnusamy and sivakumar uthandi department of agricultural microbiology, tamil nadu agricultural university, coimbatore 641 003, tamil nadu, india corresponding author a b s t r a c t coconut and coco medium. Cooccurrence of pathogenic and nonpathogenic fusarium. As such rots are caused by complexes of pathogens, the economic impact is hard to quantify. Lasiodiplodia theobromae causes vascular streak dieback vsd. Resistance was assessed as the size of necrotic lesions, distance of fungal colonisation in the stem. Water transmits fungal spores from deadwood to the surfaces of immature fruit where the fungus colonizes the dead tissue of the button. An illustrated key to neotropical termite genera insecta. This disease has been reported in hawaii and india only, but unidentified botryodiplodia spp.
Lasiodiplodia theobromae causes vascular streak dieback vsdlike. Botryodiplodia theobromae is a cosmopolitan and diverse species. Lasiodiplodia theobromaevsdlike symptomscacaopathogenicity recently, cacao theobroma cacao growing in the philippines is making a comeback because of the increasing local and global demand for dried fermented cacao beans. Keratomycose et endophtalmie detiologie exceptionnelle.
Lasiodiplodia theobromae causes vascular streak dieback. However, wadud and ahmed 1962 have reported that l. Some other isolates of the first six mentioned taxa behave as nonpathogenic. Lasiodiplodia theobromae causes a damaging diebackof cocoa.
Evaluation of jasmonic acid production by lasiodiplodia. Lasiodiplodia theobromae is a facultative parasite that completes its life cycle on dead twigs in groves by growing and sporulating in the deadwood of citrus trees. Linolenate 9r dioxygenase and allene oxide synthase activities of lasiodiplodia theobromae. Lasiodiplodia theobromae in citrus fruit diplodia stem. The cushion gall disease complex corresponds to abnormalities that occur on the trunk and branch. Mckenzie 1989 describes the fungus as predominantly a virulent wound pathogen associated with blights, dieback, root and collar rots, dampingoff, and with preharvest and storage rots of fruit, yam, taro, etc. These strains inhibited the growth of mr and mp, both in the confrontation of. Lasiodiplodia theobromae productos biologicos farmagro. Mar 16, 2020 synonym of lasiodiplodia theobromae pat. Towards rational cocoa production and efficient use for a sustainable word coca economy. Materials and methods lasiodiplodia theobromae was isolated from inflorescences of cashew showing typical symptoms of inflorescence blight disease in ibadan, nigeria.