The central-government has sent 11-teams to Gujarat to tackle the problem-of-locusts entering various districts of the state from Pakistan side and damaging crops, an official said. Massive swarms of locusts which are mainly-tropical-grasshoppers with strong powers of flight descended on Banaskantha, Mehsana, Kutch, Patan and Sabarkantha districts in the last few-days and were destroying crops like mustard, fennel, cumin, cotton, potato, wheat and jatropha.