These mite-infested galls can be found on the upper leaf surface and they are pinkish in color at the beginning and become green on maturity. [..] The females of mites lay eggs singly or in clusters on the upper surface or lower surface on newly emerged tender leaves. The feeding of the nymphs on the sap stimulates the development of pale green to yellowish galls on the leaf surface.

The galls caused by the mites are mostly hypophyllous; ovoid or irregularly conical; cavity with long hairs, with a rugose surface, arising on the leaf blade. The color is greenish or yellowish with the surface somewhat ridged. The lower surface is covered by a thin layer of cells which ruptures to permit the emergence of the adult (Mani, 1973). There may be numerous generations during the year, their length varying according to the season. After the emergence of the adult, the gall dries and turns into dark brown color. The gall cavity is lined by a small closely packed mass of cells lacking chlorophyll which is surrounded by layers of sclerenchyma and parenchyma, also lacking chlorophyll which results in major crop loss.

The feeding by the mite [..] causes abnormal cell development and the formation of galls. The developing galls enclosethe feeding mite