Science, asked by shwetakumaripat32, 1 month ago

(D) mussel
quatic insects in freshwater nursery are controlled by application of
1) soap oil emulsion
(B) cowdung
C) groundnut oil cake
(D) mustard oil cake​

Answers

Answered by glaxmisusheela
0

Answer:

(D) Mustard oil

Explanation:

Spraying oil on water surface to control insects which come up to take atmospheric air, is a well- known principle, and a routine practice in malaria control. It is also reported that some fish farmers in Bengal use mustard oil to segregate Notonectids and carp fry when they are kept in hapas.

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