Results 61 to 70 of about 14,349 (226)

New resistance mechanism in Helicoverpa armigera threatens transgenic crops expressing Bacillus thuringiensis Cry1Ac toxin

open access: yes, 2005
In Australia, the cotton bollworm, Helicoverpa armigera , has a long history of resistance to conventional insecticides. Transgenic cotton (expressing the Bacillus thuringiensis toxin Cry1Ac) has been grown
Moores, G.   +9 more
core   +1 more source

SINERGISME Spodoptera litura Nuclear Polyhedrosis Virus JTM 97C (SlNPV-JTM 97C) DENGAN EKSTRAK BIJI SIRSAK (Annona muricata L.) DALAM PENGENDALIAN Helicoverpa armigera Hubner (Lepidoptera: Noctuidae) PADA TANAMAN KEDELAI (Glycine max L.) DI LABORATOR

open access: yesJurnal HPT (Hama Penyakit Tumbuhan), 2016
ABSTRAK Helicoverpa armigera merupakan hama penting pada tanaman kedelai. Penelitian dilakukan untuk mengetahui sinergisme antara ekstrak biji sirsak dan SlNPV-JTM 97C. Sinergisme ekstrak biji sirsak dengan SlNPV-JTM 97C terhadap H.
Raditya Dwi Saputra   +3 more
doaj  

Matrine–Tea Saponin Synergism Involves Suppressed Detoxification and Digestion in a Leaf Beetle

open access: yesIntegrative Zoology, EarlyView.
Tea saponin and matrine showed synergistic toxicity against Plagiodera versicolora. Combined exposure suppressed digestion‐ and detoxification‐related processes, while silencing the trypsin gene Pver105950 and chitinase gene Pver001190 increased larval susceptibility to tea saponin and matrine, respectively.
Owais Khan   +4 more
wiley   +1 more source

Parental effects of Bt toxin and vitamin A on Helicoverpa armigera

open access: yesPLOS ONE, 2022
The increase in the area cultivated with vitamin-enriched transgenic crops producing Bt toxin raises the question of whether the addition of vitamins will in any way mitigates the effect of the toxin on the phytophagous insects that feed on those crops.
Carmen López   +4 more
openaire   +4 more sources

Expressional divergence of the fatty acid-amino acid conjugate-hydrolyzing aminoacylase 1 (L-ACY-1) in Helicoverpa armigera and Helicoverpa assulta

open access: yesScientific Reports, 2017
How FACs-producing generalist and specialist herbivores regulate their FACs-hydrolyzing enzyme L-ACY-1 to balance FACs’ beneficial vs. detrimental effects remains unknown.
Qian Cheng   +4 more
doaj   +1 more source

The dual crisis: Climate change simultaneously drives pollinator decline and pest outbreaks

open access: yesAgricultural and Forest Entomology, EarlyView.
Climate change acts as an asymmetric ecological filter, favouring r‐selected pest traits (rapid reproduction, generalism) while disadvantaging K‐selected pollinators. For every 1°C of warming, bee species richness declines ~25% since the 1990s, while pest‐induced crop losses increase by 10%–25%. A network‐centric approach integrating climate‐responsive
Diriba Fufa Serdo
wiley   +1 more source

Coocclusion of Helicoverpa armigera Single Nucleopolyhedrovirus (HearSNPV) and Helicoverpa armigera Multiple Nucleopolyhedrovirus (HearMNPV): Pathogenicity and Stability in Homologous and Heterologous Hosts

open access: yesViruses, 2022
Helicoverpa armigera single nucleopolyhedrovirus (HearSNPV) is a virulent pathogen of lepidopterans in the genera Heliothis and Helicoverpa, whereas Helicoverpa armigera multiple nucleopolyhedrovirus (HearSNPV) is a different virus species with a broader host range. This study aimed to examine the consequences of coocclusion of HearSNPV and HearMNPV on
Maite Arrizubieta   +5 more
openaire   +6 more sources

Pest‐preservation paradox among insects

open access: yesConservation Biology, EarlyView.
The pest‐preservation paradox is a non‐binary perspective that insects range from those that are harmful and requiring management on the one side, to those requiring conservation intervention on the opposite end of the spectrum. Importantly, the vast majority of insects occur somewhere in the center of the two extremes, and their position along the ...
Michael J. Samways   +3 more
wiley   +1 more source

Evidence for a defensive ceiling in the effectiveness of plant silicon defences against an insect herbivore

open access: yesEcological Entomology, EarlyView.
Silicon‐mediated resistance in wheat reaches a defensive plateau; accumulating silicon beyond 2mM provides no additional benefit for suppressing insect herbivore relative growth rates. Silicon supplementation significantly increases wheat biomass and effectively ameliorates plant mass losses caused by Helicoverpa armigera herbivory. Lower mandible wear
Marie‐Emma Denarié   +4 more
wiley   +1 more source

On the competitive fitness of baculoviruses in insects [PDF]

open access: yes, 2009
Mixed infections of baculoviruses in insect hosts are quite common in nature. This leads to ‘within-host’ and ‘between-host’ competition between virus variants.
Georgievska, L.
core  

Home - About - Disclaimer - Privacy