How do I identify my Helicoverpa armigera?
They are white, later becoming greenish. The larvae take 13 to 22 days to develop, reaching up to 40 millimetres (1+1⁄2 in) long in the sixth instar. Their colouring is variable, but mostly greenish and yellow to red-brown. The head is yellow with several spots.
What is the damaging stage in gram pod borer?
The pest is active through out the year but damage to gram is cause from November to March. The damage is caused by the larvae which feed on the leaves and destroy the seedlings in the early stages.
What is the class of Helicoverpa armigera?
InsectsCotton bollworm / Class
Which is the damaging stage of Helicoverpa armigera?
armigera can cause significant reductions for soybean in Brazil, and it is necessary to intensify monitoring and use of efficient and alternative control methods for the use of insecticide. In conclusion, our study shows that growth stage R5. 1 is more sensitive to damage by H. armigera than the R2 stage.
How do you control borer pods?
Apply biopesticides such as Bt or neem products. They usually give good control of pod borers, provided they are applied to pods before the young caterpillars enter into the pods. Once the caterpillars have entered the pods they are difficult to control and by then they have caused damage.
What is the damaging stage of Helicoverpa armigera?
Damage after full-pod stage leads to reduced potential to compensate for the damage. H. armigera feeds mostly in the middle third of soybean plants. The rate of seed-yield loss at R2 growth stage was 7.7 g per larva and 10.6 g per larva at R5.
Which crop is infested by gram pod borer?
Gram pod borer It is a polyphagous pest, infesting gram, lablab, safflower, chillies, groundnut, tobacco, cotton etc. Egg: Spherical, yellowish eggs are laid singly on tender parts and buds of plants.
Which stage of gram crop is damaged by Helicoverpa armigera?
The correct answer is Early stage.
How can you tell if a bean pod is a borer?
They are pale cream, with two rows of dark dots on their backs (Photos 1&2). They grow to 18 mm before they exit the pods and pupate in the soil. The moths (Photos 3&4) have brown front wings, with white patches. The hind wings are mostly white with a brown border.
In which crop the insect pod borer is commonly found on?
Maruca vitrata is a pantropical insect pest of leguminous crops like pigeon pea, cowpea, mung bean and soybean. Its common names include the maruca pod borer, bean pod borer, soybean pod borer, mung moth, and the legume pod borer. The species was first described by Johan Christian Fabricius in 1787.
What is used for management of Heliothis armigera on chickpea cotton?
bassiana was highly effective in controlling H. armigera populations in chickpea after two sprays under field conditions.
What insects bore holes in beans?
Bean pod borers such as the lima bean vine borer, also known as the legume pod borer, is a member of the Lepidoptera family. These destructive pests begin their rampage as larvae or grub-like caterpillars, which eventually morph into tiny moths.
Do I need permission to publish a photo of Helicoverpa armigera?
For publication in journals, books or magazines, permission should be obtained from the original photographers with a copy to EPPO. Carnation flower heads damaged by H. armigera, showing petals eaten away and entry holes of larvae. Courtesy: Central Science Laboratory, York (GB) – British Crown. French beans attacked by Helicoverpa armigera.
What is the size of Helicoverpa armigera?
Helicoverpa armigera (cotton bollworm); adult. wingspan 3.5-4 cm, 14-18 mm long; forewings with 7-8 blackish spots on the margin and a broad, irregular, transverse brown band. Hindwings pale-straw colour with a broad dark-brown border containing a paler patch, with yellowish margins.
When was the annual report published for the Helicoverpa armigera in Kenya?
Annual Report 1988-89. Nairobi, Kenya: IIBC. Cock MJW, van den Berg H, Odour GI, Osongo EK, 1991. The population ecology of Helicoverpa armigera in smallholder crops in Kenya with emphasis on its natural enemies. Final Report, Phase II: April 1988-March 1991. Nairobi, Kenya: IIBC. Colvin JT, 1990.
What is Helicoverpa armigera control scheme?
Helicoverpa armigera control scheme based on the protection and application of natural enemies and its implementation. Journal of Shandong Agricultural University, 26:86-89. Ren BZ, et al. , 1995. Identifications on the predominant natural enemies of cotton bollworm and studies on its population dynamics.