Question

Make a chart showing various diseases of some major crops, their symptoms, pathogen and measures applied for their control.

Answer 1

Crops	Diseases	Symptoms	Pathogen	Control Measures
Rice	Rice Blast disease	The symptoms of rice blast include lesions that can be found on all parts of the plant, including leaves, leaf collars, necks, panicles, pedicels, and seeds.	Fungus Magnaporthe oryzae	The triazole and strobilurin fungicides demonstrated significant fungicidal effects against rice blast.
Wheat	Leaf Rust	Leaf rust attacks foliage only. Identifying symptoms are dusty, reddish-orange to reddish-brown fruiting bodies that appear on the leaf surface. These lesions produce numerous spores, which can cover nearly the entire upper leaf surface.	Fungus Puccinia triticina	Good control of wheat rusts can be achieved with commercially available fungicides and proper application timing.
Tobacco	Tobacco mosaic disease	Symptoms associated with TMV infections are stunting, mosaic pattern of light and dark green on the leaves, malformation of leaves and distinct yellowing only of veins.	Tobacco mosaic virus	Several precautions can be taken to reduce the mechanical spread of viruses: avoid handling plants (plant seed rather than transplants), remove diseased plants, control weeds and rotate crops, and avoid planting near virus-infected plants.