Insecticides are are just one type of pesticide, specifically for insects. These are basically the substance or a mixture of substances intended to prevent, destroy, repel, or mitigate insects (as mentioned above by # Ikbal Chaieb .

Whereas, an acaricides are substances that can destroy mites. Both are collectively called as pesticide.

However, Insecticides and pesticides come in different formulations, which determine how they are used and their efficacy against certain pests,but, Acaricide targets specifically, the members of the arachnid subclass Acari, which includes ticks and mites; more specifically "Ixodicides" are substances that kill ticks whereas "Miticides" are substances that kill mites.

Pesticide resistance develops is extremely variable between species.

Insecticide being broad spectrum as well the high degree of selective pressure which organic insecticides place on insect populations has resulted into the arousal of resistance against them.

Due to being very specific to Acari population, less widespread of acaricide & reduced selection pressure causes much slower development of resistance against it.

We arfe lucky that not all the acaricides are also insecticides: for example to destroy the parasite mite on honey bees- Varroa destructor - we have to use acaricide that do not harm the honey bees. For example amitraz. Generally the differences in the action between the 2 categories are due to differencesin the cutticule of these arthropods.

Mode of action is another important feature of any pesticide either insecticides or acaricides. The Feeding habits of most of the insects differ from the mites.

Thus manufacturers prepare pesticides separately for both the group's.

Finally we can conclude that acaricides and insecticides are different formulation

I agree with Iqbal.......

No, its depends on nature of Acaricides or Insecticides. I am agree with Ikbal Chaieb and Aarti Rama explanation. ..............

Acaricides are used against nematodes where as insecticides are against insects. Acaricides need not be insecticides and insecticides need not be acaricides.