Population dynamics of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae)

Tripathi, S. R.; Singh, Rajendra

doi:10.1017/s174275840001122x

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Under different circumstances, mortality of the life stages of cotton pests has been considerably underestimated, first because various methodologies have been employed in life-table studies. For example, survival rates of 2-5% for H. armigera on cotton have been reported in India (Nanthagopal and Uthamasamy, 1989), and 13-28% (Tripathi and Singh, 1991) and 37-94% (Bilapate, 1981) by others, whereas the estimate in East Africa was 7-18% (van den Berg and Cock, 1993). Second, parasitism by egg-larval parasitoids of H. armigera occurs in the first two larval instars, which are difficult to find or are often overlooked (Romeis and Shanower, 1996).…”

Section: Perspectivementioning

confidence: 98%

Improving the Conservation and Effectiveness of Arthropod Parasitoids for Cotton Pest Management

Gahukar¹

2006

Outlook Agric

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Cotton is infested by sucking pests (aphids, jassids, whiteflies, thrips, plant bugs) and bollworms causing deterioration in lint quality and 10-40% losses in crop production. Insecticides used extensively to control these pests cause undesirable secondary effects including the destruction of arthropod parasitoids, which constitute an important component of pest management. When released parasitoids die or become ineffective in cotton ecosystems, the classical biological control fails. Therefore, conservation of potential parasitoids is nowadays considered a major step in maintaining populations in a region where they could reduce the pest population density below economic thresholds and reduce plant damage below economic injury levels. By employing the least disruptive control measures and by adopting proper habitat management, it would be possible to enhance the survival, conservation and physiological/behavioural performance of the generalist and specific parasitoids in cotton-production systems.

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Section: Perspectivementioning

confidence: 98%

Improving the Conservation and Effectiveness of Arthropod Parasitoids for Cotton Pest Management

Gahukar¹

2006

Outlook Agric

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“…2004), dok u tropskim uvjetima razvija i do 11 generacija godišnje. Budući da se generacije međusobno isprepliću, teško je odrediti točan broj na godišnjoj razini (Tripathi i Singh 1991). Odrasli su uglavnom aktivni u sumrak kada i počinje kopulacija (Sullivan i Mollet 2007) koja može trajati i do tri dana (Queiroz-Santos i sur., 2018).…”

Section: žIvotni Ciklus -Life Cycleunclassified

Procjena mogućeg porasta štetnosti žute kukuruzne sovice (Helicoverpa armigera Hübner) u Hrvatskoj

Gašparić

Jurić

Bažok

2022

Entomol. Croat. (Online)

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Žuta kukuruzna sovica (Helicoverpa armigera Hübner) značajan je polifagni štetnik kukuruza, duhana, pamuka, slanutka i rajčice. Štete čine gusjenice ishranom na vegetativnim i generativnim dijelovima biljaka domaćina. Štete u svijetu procjenjuju se na dvije milijarde dolara godišnje. Rasprostranjena je na području Azije, Afrike, Južne Amerike, Europe i Australije. Migratorna je vrsta i može se kretati na veće udaljenosti. Godišnje ima 2 do 3 generacije na našim prostorima, a u tropskim uvjetima može razviti do 11 generacija. Pojavi žute kukuruzne sovice pogoduju visoke temperature tijekom proljetnog i ljetnog razdoblja te veće količine oborina tijekom proljeća. Porastom temperatura skraćuje se vrijeme potrebno za čitav životni ciklus. S obzirom na to da se do kraja sljedećeg stoljeća predviđa povećanje srednje dnevne temperature za 3°C, može se očekivati povećanje broja generacija i štetnosti H. armigera. Zbog nedostatka raspoloživih mjera suzbijanja, praćenje biologije i migracijskog kretanja H. armigera važno je za procjenu rizika od prodora na neko novo područje ili usjev.

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“…The larvae of pod borer feeds on the leaves, stem, pods and the seeds of gram, yield losses mainly occurred due to the pod damage. A single larva can destroy 30-40 pods before attaining the maturity (Tripathi and Sharma, 1985). Pod borer alone can cause around 150-200 million rupees losses annually (Chndrashekar et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Impact of Intercrop Combinations in the Management of Gram Pod Borer, Helicoverpa armigera (Hubner) in Chickpea

Mehra¹,

Singh²

2022

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Background: Bengal gram or chickpea (Cicer arietinum L.) is an important pulse crop grown in North India. The gram pod borer, Helicovera armigera (Hubner) is the major biotic constraint in the production of gram and causes heavy crop losses (20-60%) throughout the India. The damage caused by pod borer starts from early stages and continues up to the vegetative growth, flowering, poding and till maturity of the crop. The larvae of pod borer feeds on the leaves, stem, pods and the seeds of gram, yield losses mainly occurred due to the pod damage. A single larva can destroy 30-40 pods before attaining the maturity. Cultural practices like use of different intercrop combinations might be successful in avoiding or reducing the pod borer infestation. The current study was aimed to find out the best possible intercrop combination for the management of pod borer in chickpea. Methods: A field experiment was conducted at research farm, College of Agriculture, SKRAU, Bikaner during Rabi, 2014-15 and 2015-16 to study the impact of different intercrop combinations in the management of gram pod borer, in chickpea. Result: The intercrops, viz., wheat, barley, mustard, linseed and safflower with chickpea significantly reduced the population of H. armigera over the sole crop of chickpea. The minimum larval population and pod damage was observed in chickpea+safflower intercrop combination, whereas, the maximum was observed in chickpea+linseed. The highest equivalent yield (11.93 q ha-1) was computed in chickpea+barley, whereas, minimum (10.17 q ha-1) being in chickpea+linseed intercrop combination.

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Population dynamics of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae)

Cited by 5 publications

References 7 publications

Improving the Conservation and Effectiveness of Arthropod Parasitoids for Cotton Pest Management

Improving the Conservation and Effectiveness of Arthropod Parasitoids for Cotton Pest Management

Procjena mogućeg porasta štetnosti žute kukuruzne sovice (Helicoverpa armigera Hübner) u Hrvatskoj

Impact of Intercrop Combinations in the Management of Gram Pod Borer, Helicoverpa armigera (Hubner) in Chickpea

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