Leaves were collected based on the symptoms, size and number of lesions associated. Good sanitation practices will help control this disease. The disease causes serious losses to young shoots, flowers and fruits under favorable climatic conditions (high humidity, frequent rains and the temperature range of 24- 32°C). Raised, tumor-like growth with yellow halo on young fruits. The disease produces leaf spot, blossom blight, withered tip, twig blight and fruit rot symptoms. Algal leaf spot affects avocado, guava, pepper, magnolia, kava, tea, coffee, oil palm, vanilla, mango, breadfruit, and cacao. The spots are initially circular, slightly elevated and later coanesce to form irregular spots. Symptoms produced by the disease are very much like those of anthracnose. Mushroom root rot Armillaria tabescens. Initially, small, dark spots form and then they coalesce to form irregularly shaped, dark, dry lesions. grey leaf spot of maize causal organism Posted on December 14, 2020 by Reniform Rotylenchus spp. Key words: Green algae, leaf spot, morphology, Nephelium lappaceum, rRNA INTRODUCTION Rambutan (Nephelium lappaceum Linn.) Mango malformation Fusarium subglutinans (Note: some debate remains as to complete etiology of this disease.) To summarize the main results, the plant parasite causing algal leaf spot was identified as Cephaleuros virescens, and in sequencing-based phylogenetic analysis the Cephaleuros PSU-R5.1 isolate from rambutan grouped with the algae in genus Cephaleuros. Algal leaf spot is a foliar disease most commonly seen in warm humid climates or in greenhouses. The main symptoms of bacterial black spot of mango appear on leaves and fruits but twigs and branches may also be affected in severe cases. Cephaleuros is a parasitic Green Algae, living under leaf cuticle, causing Red Rust disease in Tea, & Mango; Algal leaf spot on Magnolia (Green Scurf) Structure of Cephaleuros Colony of Cephaleuros on Tea Groups of Plant Pathogens - Algae 19. The Garden wouldn't be the Garden without our Members, Donors and Volunteers. During wet weather, the algae produce spores that are spread by wind and splashing rain. Abstract and Figures In this study Cephaleuros virescens was found to be the causal organism of a leaf spot disease on Para rubber (Hevea brasiliensis). This confirms C. virescens as a causal organism of algal leaf spot disease on rambutan in southern Thailand. They are formed singly on the vegetative filaments. Algal leaf spot can be reduced by maintaining tree vigor with cultural techniques such as proper fertilization and irrigation, proper pruning to enhance air circulation within the canopy and sunlight penetration, managing weeds and wider tree spacing. 1 a) Leaf spot on Hevea braziliensis leaf, b)lesioncaused by Cephaleuros on upper leaf, c) lesion on lower leaf surface, d) young thallus on upper leaf surface with sporangiophores, e) thallus with gametangia (G) and setae (Se), f) Spores mature, fall off and leave cream to white velvet texture on the surface of leaf. Mango suffers from several diseases at all stages of its life. On leaves the spots may vary form specks to big patches which may be crowded or scattered. Its major distribution in India has been in Bihar, Karnataka, and U.P. Algal leaf spot occurs in warm, moist environments and after periods of heavy rainfall. Algal leaf spot lesions on guava foliage ‹ › × Symptoms. 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