5 articles for “Helicoverpa armigera”

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Research ArticleOpen accessPhrase in the titleSynthetic Pyrethroid Resistance in Field Strains of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) in Tamil Nadu, South IndiaP. Duraimurugan, A. RegupathyResistance to synthetic pyrethroids was diagnosed in the field population of American bollworm, Helicoverpa armigera (Hubner) from Coimbatore, Tamil Nadu, South India during 2003-2004 cropping seasons. A Discriminating Dose (DD) bioassay technique was used to monitor fortnightly changes in resistance at Coimbatore where number of crops served as host plants for this pest. The resistance level of various synthetic pyrethroids … …American Journal of Applied Sciences, Vol. 2, Issue 7 · 31 Jul 2005 · 6,856 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titlePush-pull Strategy with Trap Crops, Neem and Nuclear Polyhedrosis Virus for Insecticide Resistance Management in Helicoverpa armigera (Hubner) in CottonP. Duraimurugan, A. RegupathyInsecticide resistance in Helicoverpa armigera (Hubner) is a major threat to cotton production in India. The virus infection was found to increase the susceptibility of H. armigera to the insecticides. But, use of Nuclear Polyhedrosis Virus (NPV) on a larger scale and on cotton due to leaf alkalinity poses certain practical problems. Hence, studies were carried out to assess the … …American Journal of Applied Sciences, Vol. 2, Issue 6 · 30 Jun 2005 · 9,098 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsThe Influence of Bioecological Factors on the Development of the Bracon during Breeding under Laboratory ConditionsKarlygash Alpysbayeva, Ainur Alimbekova, Ainura Adilkhankyzy et al.In the presented work, the authors investigated the development and sex ratio of the Bracon in various environmental conditions. The greater Galleria mellonella was used as the host of the entomophage under laboratory conditions. The authors studied the influence of the temperature environment, additional imaginal nutrition and the age of the host on the sex ratio of the Bracon. Experiments … …OnLine Journal of Biological Sciences, Vol. 21, Issue 2 · 8 Apr 2021 · 6,618 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDevelopment of Environmentally Friendly Protection Measures Against Pests and DiseasesN. S. Mukhamadiyev, A. M. Chadinova, N. Sultanova et al.The paper describes the monitoring of phytosanitary conditions in different regions of the Almaty region (Kazakhstan) and demonstrates the large population of cruciferous fleas (Phyllotreta cruciferae) on rapeseed plants, which reaches 7-9 spec./m2, exceeding the economic injury level (3-5 spec./m2). The disease is observed to spread on wheat and barley seeds. Proceeding from this, the study aims to develop effective … …OnLine Journal of Biological Sciences, Vol. 23, Issue 2 · 27 Apr 2023 · 5,241 accessesView PDF Cite

Research ArticleOpen accessIn the abstractStudy of the Efficiency of the Entomophage Habrobracon Hebetor Say to Control the Number of Etiella zinckenella Tr. on Soybean CropsIrina Sergeevna Agasyeva, Maria Vladimirovna Nefedova, Anton Sergeevich NastasiySoybean is a valuable crop in many countries of the world. The world sowing area of soybeans is about 100 million hectares. It is grown in the main agricultural regions of 90 countries. To obtain a stable yield level, it is necessary to take into account the activity of arthropod organisms, both harmful and beneficial. The species composition of arthropods … …OnLine Journal of Biological Sciences, Vol. 21, Issue 2 · 7 May 2021 · 6,762 accessesView PDF Cite