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Let the speed of boat in still water be x km/hr and that of stream be y km/hr. ATQ, ⇒ (x + y) – (x – y) = 8 ⇒ y = 4 km/hr ⇒ x = 4 × 11/4 = 11 km/hr Required time = [60/(11+4)] + [42/(11−4)] = 10 hr
Rust disease in sugarcane is caused by
Which method of plant disease management involves eliminating or inactivating disease organisms after their establishment?
Which plant disease is caused by Hemileia vastatrix?
Initial symptom appears in …………………….. months old crop as thin papery white young leaves at the top of the cane in grassy shoot diseas...
What method involves the use of clear polythene film over moist soil during sunny summer days to increase soil temperature and inactivate many soil-born...
What type of resistance is effective against all races of a pathogen but is of permanent nature?
Citrus canker is _____ disease.
In plant pathology, what are "symptoms" referring to?
The relationship between two organisms, where both of them benefit from each other is called:
What is the principle involved in DNA movement in Electrophoresis?
