Question
The important biological control insect for Parthenium
hysterophorus in India isSolution
Zygogramma bicolorata , variously referred to as the Parthenium beetle or Mexican beetle.Adults and larvae are used as a form of biological pest control  in India in order to control Parthenium hysterophorus . [3]
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Present ages of P and Q are in the ratio 4:7 respectively. If Q’s age, 15 years hence from now will be 6 times of P’s age, 6 years ago from now, the...
Present ages of 'P' and 'Q' are in ratio 5:6, respectively. If ten years hence from now, age of 'P' will be 25% less than that of 'Q', then find the rat...
 Present average age of A, B and C together is 44 years. Age of B is 12 Years hence from now will be 260% more than age of A. Four years ago from now ...
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