Scale insect — Coconut

Symptoms

These flat, circular insects attach themselves in large numbers to the underside of the leaflets to suck the plant sap.The first visible signs are distinct yellow spots on the upper surface of the leaves, directly above where the insects are attached. As the colony grows, these spots merge, causing the entire leaflet to turn yellow, then brown, and finally dry out. In severe infestations, the scales encrust the tender nuts and flower stalks, leading to stunted nuts, premature button shedding, and a crown that appears blighted or scorched