Info About Disease Plants

Rice (Oryza Sativa): Rice is the seed of the grass species Oryza Sativa. It is a cereal and staple food of most of the countries. Rice, a monocot, is normally grown as an annual plant, although in tropical areas it can survive as a perennial and can produce a ratoon crop for up to 30 years. Rice cultivation is well-suited to countries and regions with low labour costs and high rainfall, as it is labour-intensive to cultivate and requires ample water. It is widely cultivated across the globe. It is the 3rd highest worldwide cultivated crop (rice, 741.5 million tonnes in 2014), after sugarcane(1.9 billion tonnes) and maize (1.0 billion tonnes).

1) Name of the disease: Bacterial leaf streak a) Symptoms: Small, water-soaked streaks between leaf veins which are initially dark green and then turn translucent; leaves turn brown and then gray-white in colour before they die; streaks grow larger, coalesce and turn light brown in colour; tiny beads of yellow coloured bacterial exudate are common on the surface of the streaks;

b) Causes: Bacteria 2) Name of the disease: Brown spot of rice a) Symptoms: Circular, brown lesions on seedling; distorted primary and/or secondary leaves on seedlings; reduced kernel weight; black discoloration of roots; death of seedlings; circular or oval lesions with gray center and reddish-brown margin on older plants; death of large areas of leaves; brown or black spots on grain; reduced number of grains;

b) Causes: Fungus 3) Name of the disease: Sheath rot of rice a) Symptoms: leaf sheath discoloration irregular spot with dark reddish, brown margins and gray center or brownish grey throughout. Panicles that have not emerged rot and the florets turn red-brown to dark brown.

b) Causes: Bacteria