Disease of guava and its management by rafiq

Disease of Guava and its Management

1. My Introduce Name : Md. R afiqul Islam ID : 16109015 Program : BSAg 3/28/2018 1

2. Disease of Guava and its Management 3/28/2018 2

3. Introduction Guava is a common fruit in our country. Its scientific name is  Psidium guajava . Guava is good sources of  vitamin-C and minerals . 100 g fresh fruit provides 228 mg of vitamin-C, more than three times the required daily recommended intake. Some disease and management about guava are given bellow. 3/28/2018 3

4. Disease name : Algal leaf spot Pathogen name: ( Cephaleuros virescens ) SYMPTOMS Orange, rust-colored, dense, silky tufts on both upper and lower surfaces of leaves which turn reddish-purple in color as they mature . 3/28/2018 4

5. Continue If tufts are scraped away, a thin gray-white or dark-colored necrotic spot remains on the leaf; bark on twigs and branches may be cracked; young stems and fruit may also be attacked. 3/28/2018 5

6. MANAGEMENT Ensure trees receive adequate fertilization, irrigation. promote air circulation through the canopy; periodic applications of a copper based fungicide is usually enough to control the disease . 3/28/2018 6

7. Disease name : Anthracnose Pathogen name : ( Colletotrichum gloeosporoides ) SYMPTOMS Sunken, dark colored lesions on mature fruit which may become covered in pink spores; lesions coalesce to form large necrotic patches on surface of fruit . 3/28/2018 7

8. MANAGEMENT Use resistant variety of guava . Both systemic and non-systemic fungicides are effective at controlling the disease and are usually applied shortly before flowering and during fruit development. 3/28/2018 8

9. Disease name : Rust (fungal) Pathogen name : Puccinia psidii SYMPTOMS Orange to red pustules appearing on leaves, young shoots, flowers and/or fruit; leaves distorted; defoliation of tree; reduced growth; circular lesions on fully expanded leaves with dark borders and yellow halos. 3/28/2018 9

10. MANAGEMENT Application of appropriate fungicides. Good sanitation practices . Adequate fertilization. Irrigation and pruning of trees. 3/28/2018 10

11. Disease name : Root knot Pathogen name: Meloidogyne  spp . (nematode) SYMPTOMS Galls on roots which can be up to 3.3 cm (1 in) in diameter but are usually smaller; reduction in plant vigor; yellowing plants which wilt in hot weather. 3/28/2018 11

12. MANAGEMENT Plant resistant varieties Check roots of plants mid-season or sooner if symptoms indicate nematodes. Solarizing soil can reduce nematode populations in the soil and levels of inoculums of many other pathogens . 3/28/2018 12

13. Conclusion We have already discussed about plant disease and its management .we should not depend on not only chemical control but also cultural and biological method for control plant disease. 3/28/2018 13

14. Have any Question ? 3/28/2018 14

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