Dear Sri Nikhil,
I am feeling very sorry for the bad incidence for your Moringa crop. It is unfortunate. pl dont loose your hopes on agriculture.
Malathion works well against Bud Worms.
I have gone through your photographs. in general very little pest affects the moringa plants. In these Bud worms, Cater Pillars,Aphids, and Termites rarely spoils the moringa plants. Rarely Root Rot also troubles the Moringa plants.
Termites: If the soil at your plants are in dry condition, sufficient water is not supplied regularly, If the soil is Red loomy, there is possibility for attack of Termites. But this will happend in only neglected stage. As you are a senior, and sincere farmer ,I don't think, this.
Root Rot:Due to Root Rot, soil born, the plant will get dried and damaged. This will happen mostly, if your plants are suffered with heavy water logging. Is there any water logging.
I went to concerned professor of GKVK and found he is on camp. Probably i will be meeting him on Monday or tuesday, and try to get a solution.
Hope the best, g.p.rao, farmer