scholarly journals BIOLOGICAL AND TOXICOLOGICAL EFFECTS OF FOUR MINOR NUTRIENTS ELEMENTS ON THE FOURTH INSTAR LARVAE OF THE BLACK CUTWORM, AGROT1S IPSILOIV (HOFNAGEL) : LEPIDOPTERA: NOCTUIDAE

2008 ◽  
Vol 86 (2) ◽  
pp. 495-507
Author(s):  
ELHAM F. M. ABDEL-RAHIM
Keyword(s):  
Fourth Instar ◽  
Black Cutworm ◽  
Toxicological Effects ◽  
Lepidoptera Noctuidae ◽  
Minor Nutrients

Utilisation of entomopathogenic nematodes, Heterorhabditis spp. and Steinernema spp., for the control of Agrotis ipsilon (Lepidoptera, Noctuidae) in China

Nematology ◽  
2014 ◽  
Vol 16 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Xun Yan ◽  
Xiandong Wang ◽  
Richou Han ◽  
Xuehong Qiu
Keyword(s):  
Larval Stage ◽  
Entomopathogenic Nematodes ◽  
Field Trials ◽  
Fourth Instar ◽  
Agrotis Ipsilon ◽  
Exposure Rate ◽  
Black Cutworm ◽  
The Third ◽  
Lepidoptera Noctuidae

Entomopathogenic nematodes (EPN) have good application prospects for the control of the black cutworm, Agrotis ipsilon. In the present study, the effects of isolate, exposure rate, temperature and larval stage on EPN infectivity to A. ipsilon were evaluated. Results of in vitro tests showed that Steinernema carpocapsae Mex and Heterorhabditis indica LN2 were the most virulent and promising species, causing 80.0 and 83.3% mortality, respectively, to the third instar larvae at 25°C and 72 h after infection. Mortality of A. ipsilon caused by the nematodes was significantly affected by EPN exposure rate, temperature and the larval stage. Both S. carpocapsae and H. indica caused greater mortality to the third instar of A. ipsilon at 25°C than at 15, 20 and 30°C. Both EPN isolates also caused higher mortality to the second instar than to the third and fourth instar larvae of A. ipsilon. The field trials of EPN for the control of A. ipsilon also showed that S. carpocapsae Mex and H. indica LN2 reduced the damage caused by A. ipsilon and increased the cabbage yield when compared with the control. Both EPN isolates showed better control effects than cyfluthrin and Bacillus thuringiensis, indicating that these two EPN isolates could be used for sustainable control of A. ipsilon in vegetable fields in China.

Enhanced Toxicity of Bacillus thuringiensis Subspecies kurstaki and aizawai to Black Cutworm Larvae (Lepidoptera: Noctuidae) With Bacillus sp. NFD2 and Pseudomonas sp. FNFD1

2011 ◽  
Vol 104 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Tamer A. Mashtoly ◽  
Assem Abolmaaty ◽  
Mohamed El-Said El-Zemaity ◽  
Mohamed I. Hussien ◽  
Steven R. Alm
Keyword(s):  
Bacillus Thuringiensis ◽  
Pseudomonas Sp ◽  
Bacillus Sp ◽  
Black Cutworm ◽  
Lepidoptera Noctuidae

scholarly journals The Novel Agrotis ipsilon Nora Virus Confers Deleterious Effects to the Fitness of Spodoptera frugiperda (Lepidoptera: Noctuidae)

2021 ◽  
Vol 12 ◽  
Author(s):  
Tong Li ◽  
Ruobing Guan ◽  
Yuqing Wu ◽  
Su Chen ◽  
Guohui Yuan ◽  
...  
Keyword(s):  
Spodoptera Frugiperda ◽  
Rna Virus ◽  
Open Reading Frames ◽  
Agrotis Ipsilon ◽  
The Novel ◽  
Black Cutworm ◽  
A Genome ◽  
Nora Virus ◽  
Novel Host ◽  
Lepidoptera Noctuidae

In the present study, we identified a novel, positive-sense single-stranded RNA virus in the Chinese black cutworm, Agrotis ipsilon. It has a genome length of 11,312 nucleotides, excluding the poly(A) tails, and contains five open reading frames. The ORF2 encodes the conserved domains of RNA helicase and RNA-dependent RNA polymerase, while ORF4 and 5 encode three viral proteins. Herein, the A. ipsilon virus was clustered with a Helicoverpa armigera Nora virus and was thus provisionally named “Agrotis ipsilon Nora virus” (AINV). AINV was successfully transmitted into a novel host, Spodoptera frugiperda, through injection, causing a stable infection. This found the possibility of horizontal AINV transmission among moths belonging to the same taxonomic family. Nonetheless, AINV infection was deleterious to S. frugiperda and mainly mediated by antiviral and amino acid metabolism-related pathways. Furthermore, the infection significantly increased the S. frugiperda larval period but significantly reduced its moth eclosion rate. It suggests that AINV is probably to be a parasitic virus of S. frugiperda.

The concentration of lamdacyhalothrin and its effect on the cutworm Agrotis segetum (Lepidoptera: Noctuidae)

1991 ◽  
Vol 81 (2) ◽  
pp. 143-145 ◽  
Author(s):  
B.W. Blair
Keyword(s):  
Fourth Instar ◽  
Synthetic Pyrethroid ◽  
Agrotis Segetum ◽  
Economic Plant ◽  
Initial Screening ◽  
Pest Damage ◽  
Plant Damage ◽  
Antifeedant Effect ◽  
Equivalent Rate ◽  
Lepidoptera Noctuidae

AbstractDuring initial screening of the synthetic pyrethroid lamdacyhalothrin (PP 321) at a concentration of 44 and 22 mg/l and applied as a 30 ml drench over each plant against third to fourth instar cutworms, Agrotis segetum (Denis & Schiffermüller) in microplots, few died but they did not damage the plants. Reducing the concentrations to 11 and 5.5 mg/l increased mortality and plant damage. When A. segetum were confined on soil treated with the insecticide at concentrations of 22, 11 and 5.5 mg/l and sprayed at an equivalent rate of 500 l/ha, they all died within one day. The higher concentrations appeared to have a repellent and/or antifeedant effect, and it has been possible to reduce the concentration of lamdacyhalothrin to 12.5 mg/l (≡5.6g a.i./ha) for the drench treatment without risking economic plant damage. For insecticides that have repellent and/or antifeedant properties, it should be possible to balance lower concentrations with adequate protection of plants from pest damage.

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