Garlic (allium sativum) as a potent plant is used for various purposes. Garlic can be used for both culminary and medicinal purposes. Garlic has a pungent odour, thus many people refrain from eating it. It has been suggested that garlic can repel mosquitoes. Allicin, an oil found in garlic is said to be harmful to mosquitoes. Mosquitoes is among other insects that can make us sick when they bite us.

Mosquitoes find it's prey by smell. They are attracted by the carbon dioxide we emit and also lactic acid produced by the body. Others ways in which mosquitoes find their prey is through the skin temperature, moisture, floral or fruity fragrances, and wearing of dark clothing.
There are so many mosquito repellents in the market and majority contains DEET (diethyl-meta-toluamide). DEET is effective in killing and warding off mosquitoes but has damaging consequences to both humans and animals. DEET can be toxic and prolong exposure can lead to central nervous system disorder, shortness of breath, headache, weakness and can damage brain cells. In view of this, natural mosquito repellents is considered as an alternative to DEET. Garlic is one of such natural mosquito repellent. Garlic has a masking effect that prevent mosquito to find it prey. Eating more of garlic repels mosquitoes. They can't stand the smell of garlic. Allicin (garlic oil) that seeps out of the skin hide us from mosquitoes. Commercial garlic mosquitoes repellents are sold in stores but you can make your own. To make your own mosquito repellent using garlic, follow these methods below.
For skin application
Materials needed
*. 1 garlic bulb
*. 2 cups of olive oil
*. A pan
*. A strainer
*. Equal quantity of beeswax and petroleum jelly
Direction
1. Peel the garlic cloves and add in 2 cups of olive oil. Simmer in a pan for 15 minutes, and then allow to cool completely.
2. Strain the preparation to obtain only the garlic oil and discard other solids.
3. Mix equal quantity of petroleum jelly and beeswax with the garlic oil in ratio of 1:100 (garlic : petroleum jelly + beeswax).
4. Rub on the arms and legs to repel mosquitoes
For spraying
Materials needed
*. 4 garlic bulbs
*. A blender
*. A strainer
*. A spray bottle
Direction
1. Blend 4 garlic bulbs with a few drops of water to make a liquid mixture.
2. Use a strainer to separate the solids from the liquid (garlic oil).
3. Mix the garlic oil to 4 litres of water. Mix well and pour into a spray bottle.
Warning: The allicin in garlic is very strong and can result in skin problem and allergic reactions. Garlic also has social implication, it causes bad breath and body odour.
Source: http://www.justhealthng.info/2014/09/how-to-ward-off-mosquitoes-using-garlic.html

Garlic has a pungent odour or smell...One reason why people wont consider using it to ward-off mosquitoes...

The mosquito should bite...I hate garlic

OP chill jor. From your post it is obvious you haven't met a warri-bred and warri-based mosquito