Helicoverpa armigera up
|Copyright: Luciano Gollini (lousat)
|Date Taken: 2018-09-25|
|Camera: Sony Cybershot DSC HX200V|
|Exposure: f/6.3, 1/500 seconds|
|More Photo Info: [view]|
|Photo Version: Original Version|
|Date Submitted: 2018-10-09 13:29|
|[Note Guidelines] Photographer's Note|
|The upper part of the moth of my last post|
The cotton bollworm, corn earworm, or Old World (African) bollworm (Helicoverpa armigera) (also known as the scarce bordered straw in the UK, where it is a migrant) is a moth, the larvae of which feed on a wide range of plants, including many important cultivated crops. It is a major pest in cotton and one of the most polyphagous and cosmopolitan pest species. It should not be confused with the similarly named, related species Helicoverpa zea.The cotton bollworm is very variable in both size and colour. The body length varies between 12 and 20 millimetres (0.47 and 0.79 in) with a wingspan of 30–40 millimetres (1.2–1.6 in). The fore wings are yellowish to orange in females and greenish-gray in males, with a slightly darker transversal band in the distal third. The external transversal and submarginal lines and the reniform spot are diffused. The hind wings are a pale yellow with a narrow brown band at the external edge and a dark round spot in the middle.The female cotton bollworm can lay several hundred eggs, distributed on various parts of the plant. Under favourable conditions, the eggs can hatch into larvae within three days and the whole lifecycle can be completed in just over a month.
The eggs are spherical and 0.4 to 0.6 mm in diameter, and have a ribbed surface. They are white, later becoming greenish.
The larvae take 13 to 22 days to develop, reaching up to 40 mm long in the sixth instar. Their colouring is variable, but mostly greenish and yellow to red-brown. The head is yellow with several spots. Three dark stripes extend along the dorsal side and one yellow light stripe is situated under the spiracles on the lateral side. The ventral parts of the larvae are pale.They are rather aggressive, occasionally carnivorous and may even cannibalise each other. If disturbed, they fall from the plant and curl up on the ground.
The pupae develop inside a silken cocoon over 10 to 15 days in soil at a depth of 4–10 centimetres (1.6–3.9 in), or in cotton bolls or maize ears.
mamcg, marius-secan, ramthakur has marked this note useful
Only registered TrekNature members may rate photo notes.
|You must be logged in to start a discussion.|
- [2018-10-09 19:49]
Beautiful capture, me comparing the left and right wings as the right wing looks unhealthy and demage.
Well composed and exposed here nice job.
- [2018-10-10 2:12]
Thank you Luciano for sharing the other side of this new butterfly in this nice picture.
I appreciate it. Thank you also for the included information.
Nice capture of the same moth from your last post. the details and natural colors are superb.
- [2018-10-10 5:44]
Lovely dorsal perspective on this Moth with nice details on the wings, Luciano.
nice picture to show the end of the summer
great details thanks gr lou
Ciao Luciano, gran bella anche ad ali aperte questa favolosa falena, al solito gran qualità e splendida macro, bravissimo, buon week end, ciao Silvio