Larval stage:
Instar I (Fig. 1d):This stage lasted 4 – 6 days. On the first day of hatching, the instar measured 1.20 – 2.10 (1.86 0.37) mm in length. It grew to 2.25 – 3.33 (2.71 0.36) mm in length, and 0.55 – 0.74 (0.63 0.07) mm in width. The head is roughly triangular, smooth and pale black and measures 1.20 – 1.50 (1.34 0.11) mm in diameter. Body was cylindrical, shiny, light brown and fully covered with minute hairs. There was a light black mid-dorsal streak along the length of the body. By the 4th or 5th day hairs were distinct and arrangement can be clearly seen. There were six rows of hairs along the body length and 12 rows across the body.
Instar II(Fig. 1e): This stage lasted 1 – 3 days. The larva attained a length of 4.13 – 7.25 (6.22 1.22) mm and a width 1.16 – 1.35 (1.26 0.07) mm. Head measured 2.00 – 2.30 (2.16 0.15) mm in diameter. The mid-dorsal streak was turned into thick brown color. Hair bases were found clearly at this stage. Segmentation was also clear.
Instar III(Fig. 1f): This stage also lasted 1 – 3 days. The larva attained a length of 8.20 – 12.50 (10.53 1.47) mm and a width 1.20 – 1.90 (1.70 0.14) mm. Head measured 3.20 – 4.30 (3.52 0.45) mm in diameter. Body and hairs turned into brownish black. Ventral surface of the body was orange colored. Yellowish-white line was found on the both sides of the body between last vertical row of hairs and prolegs.
Instar IV(Fig. 1g): This stage lasted 2 – 3 days. The larva attained a length of 14.33 – 25.00 (18.83 3.45) mm and a width 2.26 – 4.00 (3.05 0.63) mm. Head measured 5.50 – 8.00 (6.10 1.07) mm in diameter. Head at its tips orange colored and remaining part brownish. Hair bases were surrounded by a black ring, which was in turn surrounded by a yellowish ring.