monograph of erysiphe cichoracearum by Sachin r kondaguri.pptx

monograph of erysiphe cichoracearum

1. UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE COLLEGE OF AGRICULTURE,V C FARM,MANDYA * Presen ted by : SACHIN R KONDAGURI PAMM 2030 Jr M.Sc PAT 501 (2+1) 00-05-2023 PAMM2030 Dept. of Pathology 1 Monograph of Erysiphe cichoracearum

2. 00-05-2023 PAMM2030 Dept. of Pathology 2 Erysiphe cichoracearum

3. 00-05-2023 PAMM2030 Dept. of Pathology 3 Erysiphe cichoracearum Oidium cichoracearum Anamorphic name Teleomorphic name

4. Domain : Eukaryota Kingdom : Fungi Phylum : Ascomycota Class : Ascomycetes Subclass : Leotiomycetidae Order : Erysiphales Family : Erysiphaceae Genus : Erysiphe Species : Erysiphe cichoracearum 00-05-2023 PAMM2030 Dept. of Pathology 4 TAXONOMIC CLASSIFICATION

5. On upper surface small white or greyish superficial spots later covered by fungal growth. Powdery mildew symptoms first appear as pale, chlorotic spots on leaves that soon turn powdery-white in appearance (fungal spores) and spread to petioles and stems. Defoliation occurs. Fruits becomes small and yield reduced 00-05-2023 PAMM2030 Dept. of Pathology 5 SYMPTOMS

6. The powdery mildew of cucurbits is caused by an ascomycetes fungus Erysiphe cichoracearum . The fungus produces conidia.The mycelium is superficial except for the haustoria which penetrate the host cells and absorb food material from them. Conidia are single celled, hyaline barrel-shaped and in log chains. Cleistothecium are globose and dark brown myceloid appendages. Asci are pedicellate , and ovate. Ascospores are single, hyaline, oval to sub cylindrical. 00-05-2023 PAMM2030 Dept. of Pathology 6 Discription of pathogen

7. 00-05-2023 PAMM2030 Dept. of Pathology 7 Life cycle of Erysiphe

8. 00-05-2023 PAMM2030 Dept. of Pathology 8 cleistothecia

9. 00-05-2023 PAMM2030 Dept. of Pathology 9 Cleistothecia close up view

10. This is a soil-borne disease The cleistothecia survive the off-season along with płant debris in the soil. When suitable host plants becomes available, the ascospores germinate and cause fresh infections. The conidia are responsible for secondary infection. Since the fungus has a wide host range, it can perpetuate also in the form of conidia. Disease Cycle have 2 phases 1. Perennation and Primary infection 2. Secondary infection 00-05-2023 PAMM2030 Dept. of Pathology 10

11. The dusting of powdered sulphur has been proved quite effective to control the disease. The dusting is being done once or twice during the season. Besides sulphur dust, copper sulphate and karathane have also been found effective. Spraying of crop with 0.05 to 0.2% karathane 1000 1/ha is recommended. Elosal ( wettable powder with 80% sulphur ) also provides effective control. The resistant varieties should be grown 00-05-2023 PAMM2030 Dept. of Pathology 11 MANAGEMENT

12. Thank Y u 00-05-2023 PAMM2030 Dept. of Pathology 12