Baseline Susceptibility of Striacosta albicosta (Lepidoptera: Noctuidae) in Ontario, Canada to Vip3A Bacillus thuringiensis Protein

2017 ◽  
Vol 111 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Yasmine Farhan ◽  
Jocelyn L Smith ◽  
Arthur W Schaafsma
Keyword(s):  
Bacillus Thuringiensis ◽  
Striacosta Albicosta ◽  
Lepidoptera Noctuidae

Susceptibility of Different Instars of Striacosta albicosta (Lepidoptera: Noctuidae) to Vip3A, a Bacillus thuringiensis (Bacillaceae: Bacillales) Protein

2019 ◽  
Vol 112 (5) ◽  
pp. 2335-2344 ◽  
Author(s):  
Yasmine Farhan ◽  
Jocelyn L Smith ◽  
Arthur W Schaafsma
Keyword(s):  
Bacillus Thuringiensis ◽  
Resistance Management ◽  
High Dose ◽  
Transgenic Corn ◽  
Resistance Development ◽  
Significant Difference ◽  
Survival And Development ◽  
Important Pest ◽  
Striacosta Albicosta ◽  
Lepidoptera Noctuidae

Abstract Striacosta albicosta (Smith) (Lepidoptera: Noctuidae) is an important pest of corn, Zea mays L. in the Great Lakes region, which can be controlled by transgenic corn expressing Vip3A protein from Bacillus thuringiensis. To inform insect resistance management, the susceptibility, survival, and development of first, third, and fifth instar S. albicosta to Vip3A was determined using protein-overlay and corn tissue bioassays. Tissue bioassays were also used to determine the quantity of corn tissues with and without Vip3A-expression consumed by various instars. In diet bioassays, third and fifth instars were significantly less susceptible to Vip3A compared with first instars; however, no significant difference was observed in susceptibility of older instars. In tissue bioassays, survival was lowest for larvae fed Vip3A-expressing tissues, ranging from 0 to 21%, however, developmental measures of larvae fed Vip3A-expressing tissues did not differ from those fed artificial diet or tissues of other Bt events. Consumption of Vip3A × Cry1Ab tissues did not differ from that of Cry1Ab for each instar. Estimated Vip3A exposure of first instars ranged from 3 to 57 times higher than the concentration required for 99% mortality (LC99) based on the product of the reported Vip3A expression in transgenic corn tissues and the consumption observed in tissue bioassays; however, the estimated exposure of third and fifth instars to Vip3A was lower than their respective LC99. These findings suggest that first instar S. albicosta maybe exposed to a high dose of Vip3A under field conditions; however, Vip3A-expression in corn may not be high dose against older instars, increasing the risk of resistance development.

Evidence for Field-Evolved Resistance of Striacosta albicosta (Lepidoptera: Noctuidae) to Cry1F Bacillus thuringiensis Protein and Transgenic Corn Hybrids in Ontario, Canada

2017 ◽  
Vol 110 (5) ◽  
pp. 2217-2228 ◽  
Author(s):  
J L Smith ◽  
M D Lepping ◽  
D M Rule ◽  
Y Farhan ◽  
A W Schaafsma
Keyword(s):  
Bacillus Thuringiensis ◽  
Transgenic Corn ◽  
Corn Hybrids ◽  
Striacosta Albicosta ◽  
Lepidoptera Noctuidae

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 Spodoptera frugiperda (Lepidoptera: Noctuidae) Strains from Northern Argentina: Esterases, Profiles, and Susceptibility to Bacillus thuringiensis (Bacillales: Bacillaceae)

2019 ◽  
Vol 102 (2) ◽  
pp. 347 ◽  
Author(s):  
Flavia del Valle Loto ◽  
Alfonso Emanuel Carrizo ◽  
Cintia Mariana Romero ◽  
Mario Domingo Baigorí ◽  
Licia María Pera
Keyword(s):  
Bacillus Thuringiensis ◽  
Spodoptera Frugiperda ◽  
Lepidoptera Noctuidae
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