Leaf are turning into yellowish colour, there is also insects attack on the plant around 300 plants are infected. Any recommendation?

Asalam o Alikum Sarfraz Khan This is Mealybug Click on the green link for better treatment.. U can also use sample home remedies. Pour 4 teaspoons of liquid dish soap into a spray bottle. Add 1 litre of water. Mix thoroughly. Spritz the soapy insecticide directly onto mealybugs. The soap kills on contact. ... Rinse the plant with fresh water after a couple of hours. Repeat the spray application if you notice resumed mealybug activity.

Hi Sarfraz Khan we really love to help you. You are welcome here in plantix community. As per your images it seems the attack of Mealybug Now a days it is their breeding season , they will come down from plants to lay down eggs in soil so be careful about them. If they are in less numbers you can remove them manually. Incase of heavy infestation go for the applications of profenophos 5-10 ml per L. You can get all info about this pest by clicking the green link.

They are in neighbouring fields and almost 5 to 6 leaves of every kinno fruits are being affected by these bugs. Leaves are also changing colours into yellowish. Is this bug behind this change of colour of leaves or something else?

मिलीबग spray Rocket insecticide

Sarfraz Khan yeah these bugs feed on plant sap due to limited food supply plants chnages its color. Other reason which may involve will be nutrational deficiency. I suggest you to add images of leaves for your better guidance .