scholarly journals Antifeedant and ovicidal activities of ginsenosides against Asian corn borer, Ostrinia furnacalis (Guenee)

PLoS ONE ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. e0211905 ◽  
Author(s):  
Shuangli Liu ◽  
Xiaohui Wang ◽  
Yonghua Xu ◽  
Rui Zhang ◽  
Shengyuan Xiao ◽  
...  
Keyword(s):  
Ostrinia Furnacalis ◽  
Corn Borer ◽  
Asian Corn Borer

scholarly journals Trichogramma ostriniae Is More Effective Than Trichogramma dendrolimi As a Biocontrol Agent of the Asian Corn Borer, Ostrinia furnacalis

Insects ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 70
Author(s):  
Yu Wang ◽  
Yang-Yang Hou ◽  
Giovanni Benelli ◽  
Nicolas Desneux ◽  
Asad Ali ◽  
...  
Keyword(s):  
Biocontrol Agent ◽  
Developmental Time ◽  
Economic Losses ◽  
Ostrinia Furnacalis ◽  
Female Progeny ◽  
Corn Borer ◽  
High Preference ◽  
Asian Corn Borer ◽  
Biocontrol Potential ◽  
Trichogramma Dendrolimi

The Asian corn borer (ACB), Ostrinia furnicalis, is a serious corn pest in south-east Asia, causing huge economic losses every year. Trichogramma dendrolimi and Trichogramma ostriniae, two egg parasitoids, have previously been identified as key biological control agents. To determine the age impact of ACB eggs on their effective biocontrol potential, herein we compared the biological parameters (i.e., number of parasitized eggs, emergence, developmental time, and sex ratio) of both parasitoids on ACB eggs of various ages (i.e., 0–4, 4–8, 8–12, 12–16, 16–24, 24–36, and 36–48 h old), respectively. Our results showed that the age of ACB eggs had a significant impact on the parasitization activity of T. dendrolimi in both choice and no-choice conditions. Trichogramma dendrolimi preferred to parasitize 0–8-h-old ACB eggs, and its parasitization dramatically declined on ACB eggs older than 8 h under choice and no-choice conditions. On the other hand, T. ostriniae showed high preference to parasitize all tested ACB egg ages. The age of ACB eggs had no significant impact on the parasitization of T. ostriniae under choice and no-choice conditions. Furthermore, the female progeny of T. dendrolimi decreased as the age of ACB increased, while no differences were found in female progeny of T. ostriniae. Trichogramma ostriniae also developed faster on each ACB egg age group in comparison with T. dendrolimi. Overall, the age of ACB eggs had a significant impact on T. dendrolimi performance, leading us to conclude that T. ostriniae is more effective than T. dendrolimi as a biocontrol agent of the ACB.

Baseline susceptibility of Asian corn borer (Ostrinia furnacalis (Guenée)) populations in Vietnam to Cry1Ab insecticidal protein

2019 ◽  
Vol 22 (2) ◽  
pp. 493-498 ◽  
Author(s):  
Duc Khanh Le ◽  
Quang Khai Le ◽  
Thi Thuy Hang Tran ◽  
Duc Viet Nguyen ◽  
Thi Hang Dao ◽  
...  
Keyword(s):  
Insecticidal Protein ◽  
Ostrinia Furnacalis ◽  
Corn Borer ◽  
Asian Corn Borer

scholarly journals Evolution of Asian Corn Borer Resistance to Bt Toxins Used Singly or in Pairs

Toxins ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 461 ◽  
Author(s):  
Yueqin Wang ◽  
Yudong Quan ◽  
Jing Yang ◽  
Changlong Shu ◽  
Zhenying Wang ◽  
...  
Keyword(s):  
Transgenic Crops ◽  
Model System ◽  
Cross Resistance ◽  
Ostrinia Furnacalis ◽  
Worst Case ◽  
Corn Borer ◽  
Laboratory Selection ◽  
Bt Toxins ◽  
Asian Corn Borer ◽  
Evolution Of Resistance

Transgenic crops producing insecticidal proteins from Bacillus thuringiensis (Bt) have revolutionized pest control, but the benefits of this approach have been reduced by the evolution of resistance in pests. The widely adopted ’pyramid strategy’ for delaying resistance entails transgenic crops producing two or more distinct toxins that kill the same pest. The limited experimental evidence supporting this strategy comes primarily from a model system under ideal conditions. Here we tested the pyramid strategy under nearly worst-case conditions, including some cross-resistance between the toxins in the pyramid. In a laboratory selection experiment with an artificial diet, we used Bt toxins Cry1Ab, Cry1F, and Cry1Ie singly or in pairs against Ostrinia furnacalis, one of the most destructive pests of corn in Asia. Under the conditions evaluated, pairs of toxins did not consistently delay the evolution of resistance relative to single toxins.

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