What is this on my capsicum . What should I do plz help.

Hi. Another possibility is Cochonilha Negra Please check the links to see description of the symptoms and control measures

Make a pestide fast. I am giving you the formula. Take 5 spicy green chillies and 5 garlic and one aloe vera slice gel and make a paste with your hand( without grinder)of it and add it in one glass water and leave it for 24 hours.After 24 hours separate the paste and water and in 1 litre water add 15 ml of this pesticide and 2-3 drops of liquid soap in spray bottle and spray it on your plants at the gap of 2 days

Ahmad its the attack of white flies.firstly spray water and clean the leaves(for that you can also spray 1 day old rice water or soap water.the flies will destroy)After that make a water resistance yellow card(minimum 10 cm )(yellow plastic sheet on a board or yellow painted board.....)and apply oil or greece ,and place it in the field on a stick .