What kind of insect this

Hi Rajesaheb . It's showing Magnesium Deficiency . Click on green link for checking symptoms and taking control measures from Plantix library. In my opinion, the insect looks like ant. Normally ants don't attack plants. When other small insects attack plants kile - aphids, scales or mealybugs and oozes some liquid, then these ants attack on that insect and some time harm to plant parts too. Lets check.