Tip burn of paddy

This was presented by one of the group of students to our Asst. professors Mr. and Mrs. Poudel (Pathology) in 2017. By B.Sc.Ag Paklihawa IAAS campus, Full phase 6th batch

1. Tip burn of paddy

2. INTRODUCTION Tip burn is defined as a browning of plant tissues, including leaf margins and tips, and yellowing or darkening of veins which may lead to eventual wilting and abscission of the leaf. Stagnation of water or excessive moisture by flooding in the field may cause decay or rotting of fibrous root of plants resulting into wilting. Primarily due to accumulation of toxic materials around the root and base of stem and also due to non availability of nutrients.

3. CAUSE Actual cause is not known yet. Probable causes may be: Less or no oxygen supply. Excessive moisture or water stagnation by flooding may cause decay of fibrous root resulting into wilting. Due to attack of trips. Scorching effect of fertilizer. Lack of available nitrogen. Air pollutants like CO, Sulphur dioxide, ethylene, fluoride in water.

4. SYMPTOMS Drying of leaves along the margin and at the tip. Affected leaves show lack of luster. Shows tendency to bronzing and later become scorched at tip. Drying progress and completely whole leaf dries. Leaf and stalk turn brown. Yellow patches and dried leaves may be seen scattered throughout the field. Tip necrosis and yellowing. In advance stages whole plant dry and wilt.

5. MANAGEMENT Clipping and burning of tips of seedling before transplanting will help to avoid invisible eggs laid on leaf tips. Green manuring. Draining the flooded water at early stages of crop. Apply 30-40 kg/ha of ammonium sulphate. Providing good aeration to the root.

6. Prepared by: Rachana Pandey (41) Rajendra Prasad Poudel (42) Rajesh Yadav (43) Rajiv Budhathoki (44) Rajiv Raman Neupane (45)