Cotton bollworm
mm. They are at first a shiny yellowish white, with their colour changing to brown just before the larvae emerge. The cotton bollworm (Helicoverpa armigera) [...] es five or seven stages may occur. Young caterpillars are yellowish-white to reddish-brown with dark spots. In later instars the head is mottled, and the [...] straw yellow, black, or pinkish / reddish brown. Full grown larvae are 30 to 40 mm long. The first instars are the most mobile, and move like loopers.