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Crop Protection with vernacular Names

Crop Protection with vernacular Names
11
Jul

Favourable Conditions for Rice Blast disease

1. Application of excessive doses of nitrogenous fertilizers, intermittent drizzles, cloudy weather, high relative humidity (93-99 per cent), low night temperature (between 15-20OC or less than 26OC), more number of rainy days, longer duration of dew, cloudy weather, slow wind movement and availability of collateral hosts.

File Courtesy: 
BAU Ranchi
11
Jul

Pathogen for Rice Blast disease

1. Pyricularia oryzae (Syn : P. grisea) (Sexual stage : Magnaporthe grisea)

2. Mycelium of the fungus, is hyaline to olivaceous, septate and highly branched. Conidia are produced in clusters on long septate, olivaceous slender conidiophores.

3.Conidia are obpyriform to ellipsoid, attached at the broader base by a hilum. Conidia are hyaline to pale olive green, usually 3 celled.

4. The perfect state of the fungus is M. grisea. It produces perithecia. The ascospores are hyaline, fusiform, 4 celled and slightly curved.

File Courtesy: 
BAU Ranchi
11
Jul

Rice Diseases

Rice crop of different regions within Jharkhand state is attacked by five major diseases. They are:
1. Rice Blast
2. Brown Leaf Spot of Rice
3. Sheath Blight of Rice
4. Bacterial Leaf Blight (BLB) of Rice
5. False Smut of Rice

File Courtesy: 
BAU Ranchi
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