How do you control Helicoverpa armigera?
Control of H. armigera has mostly depended on chemical insecticides and BT cotton (Guo, 1997; Ahmad et al., 1999; Wu and Guo, 2005). As a result of the continuous and widespread use of Bt cotton and long-term, large-scale, and indiscriminate chemical pesticide use, H.
Why is Helicoverpa armigera important?
Since its introduction and establishment in Brazil in 2013 and subsequent spread through most of Latin America, the Old World bollworm, Helicoverpa armigera (Hübner), has become an economically important pest of soybean, cotton, and other crops.
Which mechanical control method controls Helicoverpa armigera?
Under mechanical control of chickpea pests, especially the pod borer, Helicoverpa armigera and cutworm, Agrotis ypsilon, larvae can be managed by manual hand picking, trapping with coiled dry grasses and pit fall method, whereas, adult moths can be trapped with various traps.
What is the common name of Helicoverpa armigera?
cotton bollworm
Helicoverpa armigera is a species of Lepidoptera in the family Noctuidae. It is known as the cotton bollworm, corn earworm, Old World (African) bollworm, or scarce bordered straw (the lattermost in the UK, where it is a migrant). The larvae feed on a wide range of plants, including many important cultivated crops.
What stage does helicoverpa cause damage?
armigera larvae, showing that damage depends on the maturation stage and the potential yield of soybean plants, climatic conditions and, especially, density by larvae.
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.
Why is helicoverpa a major pest?
Helicoverpa armigera is a key pest of agriculture and horticulture in Pakistan. Costs of management and damage are gigantic in a wide range of food and fiber crops. It has been recorded on more than 100 cultivated and wild host plants. Key factors contributing to the pest status of H.
How do Americans control bollworms?
Spray using Neem-based products max 3 times (usually 2.5-3 litres/ha or 50-60 ml /20 litres water, or 20 – 50 g neem seed cake or powder / litre water, but double-check with product labels). Spray to cover fruits and entire plants. This is used to control small 1st -2nd instars of larvae (when they are < 1.5 cm long).
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.
What is Heliothis pest?
12.1.
Historically, the tobacco budworm, Heliothis virescens, was the most important lepidopteran pest of cotton in many areas of the Americas prior to the introduction of Bt cotton (Leigh et al., 1996).
How do I find my helicoverpa?
Eggs are 0.5 mm in diameter and change from white to brown to a black head stage before hatching. Newly hatched larvae (neonates) are light in colour with tiny dark spots and dark heads. As larvae develop they become darker and the darker spots become more obvious.
What is the peculiar feeding habit of Helicoverpa armigera?
Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) is a highly polyphagous insect which can feed and develop on a wide variety of native and cultivated plant species (Zalucki et al. 1986, 1994), this makes it an appropriate model insect to investigate the influence of diet on feeding behavior.
What is scientific name of American bollworm?
Helicoverpa armigeraCotton bollworm / Scientific name
What do bollworms do to cotton?
Cotton bollworm larvae damage bolls and squares. Larvae chew holes into the base of bolls and may hollow out locks. Moist frass usually accumulates around the base of the boll. Larvae may also chew shallow gouges in the boll surface, which can become infected with rot organisms.
How do you control a gram pod borer?
Management of pod borer complex
Deep summer ploughing in 2-3 years to eliminate quiescent pupa. Early sowing, short duration varieties. Avoid closer plant spacing. Install pheromone traps at a distance of 50 m @ 5 traps/ha for each insect pest.
How do you control tobacco budworms?
Insecticides that are most effective for control of tobacco budworm are products with some residual activity that can kill caterpillars for several hours or days. These include spinosad and certain pyrethroid insecticides (Table 1).
How do you control fruit borer in tomatoes?
Management: Collect and destroy the infected fruits and grown up larvae. Grow simultaneously 40 days old American tall marigold and 25 days old tomato seedling at 1:16 rows.
…
| Insecticide | Dose |
|---|---|
| Flubendiamide 20 WG | 5 g/10 lit |
| Novaluron 10 % EC | 7.5 ml/10 lit |
| Phosalone 35 % EC | 13 ml/10 lit |
| Quinalphos 25 % EC | 1.0 ml/ lit |
How do you control bollworms?
Cotton bollworms are attracted to succulent, rank-growing cotton plants; keep water, fertilizer, and plant density at recommended levels to avoid rank growth. Because populations seldom reach damaging levels before late summer, manage the crop for early maturing and plan to defoliate by late September.
Where are bollworm found?
This invasive pest can be found both in field and greenhouse settings. Old World bollworm is found in many areas of Africa, Asia, Europe, Australia, and the islands of the Western Pacific Region. It has also been reported in Brazil and may be present in other South and Central American countries.
Do bollworms eat cotton?
The Old World bollworm can feed on crops, such as corn, cotton, small grains, soybeans, peppers, and tomatoes. Damage occurs when the larvae bore into the host’s flowers and fruit and feed within the plant; the larvae may also feed on the leaves of host plants.
What is used for management of Heliothis armigera on chickpea cotton?
armigera larvae (Das et al., 2016; Silva et al., 2018; Fite et al., 2019). Bacillus thuringiensis Berliner variety kurstaki were effective at the rate of 1.50 kg/ha was successfully controlled the first and second instar larvae of H. armigera up to an average of 99.58 and 90.42%, respectively (Alemayehu et al., 1993).
What is the scientific name of gram pod borer?
Gram pod borer: Helicoverpa armigera.
What is the best spray for budworms?
What insecticide kills bud worms?
A bacteria known as spinosad (spin-OH-sid) will attack the budworm throughout all stages of life. The most commonly known product that contains spinosad is Captain Jack’s Dead Bug Brew. Just spray it on once every few weeks and the problem is solved.
What is the scientific name of tomato fruit borer?
It is devastated by an array of pests; however, the major damage is caused by the tomato fruit borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) (Sajjad et al. 2011).