Where did helicoverpa armigera lay eggs?

Oviposition by H. armigera females on tomatoes have been reported to occur mainly on the top region of the plant (Hamilton & Macdonald, 1990; Izquierdo, 1996).

1. Why Helicoverpa has become major pest?
2. How do I find my Helicoverpa?
3. Which is the site of pupation for Helicoverpa armigera?
4. What is the common name of Helicoverpa armigera?
5. What is the economic importance of Helicoverpa armigera?
6. How do you control Helicoverpa armigera?
7. Which is the damaging stage of Helicoverpa armigera?
8. Which insect is known as cotton stainer?
9. Do aphids fly?
10. Where do pink bollworm come from?
11. What is the order of mustard sawfly?
12. What is Heliothis pest?

Why Helicoverpa has become major pest?

The widespread introduction of chemical pesticides to cotton farmers devastated natural pests, particularly Helicoverpa armigera, once a minor pest, now got the status as the major pest. In contrast to chemical insecticides, the Bt toxins that will be used in cotton are not toxic to natural enemies.

How do I find my Helicoverpa?

punctigera have black hairs around the head. Moths are a dull light brown with dark markings and are 35 mm long with a 30-45 mm wingspan. Forewings are brown to reddish brown in the female and dull greenish to yellow or light brown in the male. Hindwings are pale with a broad, dark outer margin.

Which is the site of pupation for Helicoverpa armigera?

armigera moths overwinter as pupae in the soil. These overwintering pupae survive in a state of suspended development (diapause). In most seasons, diapausing pupae can be found under late summer crops such as sorghum, maize and cotton.

What is the common name of Helicoverpa armigera?

The cotton bollworm, corn earworm, or Old World (African) bollworm (also known as the scarce bordered straw in the UK, where it is a migrant) is the larva of a moth (Helicoverpa armigera), which feeds on a wide range of plants, including many important cultivated crops.

What is the economic importance of Helicoverpa armigera?

Helicoverpa armigera is an important pest of cotton and many other crops in many countries (Gujar et al., 2000). 50% of all insecticides used in India and China are used to control this pest. Farmers spend up to 40% of their annual income to buy chemicals to curb.

How do you control Helicoverpa armigera?

Pest monitoring through light traps, pheromone traps and in situ assessments by roving and fixed plot surveys has to be intensified at farm, village, block, regional and State levels. For management, an action threshold of one egg per plant or 1 larva/ plant may be adopted.

Which is the damaging stage of Helicoverpa armigera?

In conclusion, our study shows that growth stage R5. 1 is more sensitive to damage by H. armigera than the R2 stage.

Which insect is known as cotton stainer?

Dysdercus cingulatus is a species of true bug in the family Pyrrhocoridae, commonly known as the red cotton stainer. It is a serious pest of cotton crops, the adults and older nymphs feeding on the emerging bolls and the cotton seeds as they mature, transmitting cotton-staining fungi as they do so.

Do aphids fly?

Although aphids cannot fly for most of their life cycle, they can escape predators and accidental ingestion by herbivores by dropping off the plant onto the ground. ... They are often attended by ants, for the honeydew they produce and are carried from plant to plant by the ants through their tunnels.

Where do pink bollworm come from?

The Pink Bollworm, (Pectinophora gossypiella), is considered possibly the most destructive pest on cotton worldwide. It is native to Asia and has been reported in several states in the Southwest. The Pink Bollworm prefers cotton but will also feed on Okra, Kenaf, and Hibiscus.

What is the order of mustard sawfly?

The mustard sawfly, Athalia lugens (Hymenoptera: Tenthredinidae) is a polyphagous insect and is considered as devastating pest of vegetables in India.

What is Heliothis pest?

Heliothis is a genus of moths in the family Noctuidae. It was first described by Ferdinand Ochsenheimer in 1816. Some of the species have larvae which are agricultural pests on crop species such as tobacco, cotton, soybean and pigeon pea.