Publications by authors named "J Knodel"
The northern corn rootworm, Diabrotica barberi Smith & Lawrence (Coleoptera: Chrysomelidae) is a major pest of maize in the United States Corn Belt. Recently, resistance to Bacillus thuringiensis (Bt) maize was reported in North Dakota and increased use of Bt maize hybrids could facilitate resistance evolution in other maize-producing states. In this study, susceptibility to Bt proteins was evaluated in wild D.
View Article and Find Full Text PDFBacterial leaf streak (BLS), caused by pv. , has increased in both prevalence and severity in the major hard red spring wheat (HRSW)-producing state North Dakota. The disease is readily observed after flag leaf emergence and can quickly lead to defoliation and severe yield loss.
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- The soybean aphid, Aphis glycines, is a major pest for soybean crops in the Upper Midwest, having caused economic challenges for the past 20 years.
- After extensive use of pyrethroid insecticides, these aphids have developed resistance, prompting concerns over their management.
- Research shows that resistant aphid populations do not suffer from reproductive fitness costs and may even outperform susceptible populations, indicating potential long-term challenges for controlling this pest.
Article Synopsis
- * Research was conducted using synthetic pheromones and plant-derived chemicals (like allyl isothiocyanate) in various states to evaluate their effectiveness in attracting different flea beetle species.
- * Findings revealed variable attraction responses among Phyllotreta species to these substances, indicating potential for improved pest monitoring and management, though further studies are needed for optimal solutions.
Smoking and Drinking Behaviors among Older Adults: A Comparative Analysis of Three Southeast Asian Countries.
J Cross Cult Gerontol
December 2021
Studies on the two major health-risk behaviors of smoking tobacco and drinking alcohol among older populations, particularly in Southeast Asia, are limited. This paper provides comparative analyses of the prevalences and correlates of smoking tobacco and drinking alcohol among older people in Myanmar, Vietnam, and Thailand, using data from the latest available national aging surveys in the three countries. The analyses were conducted within a multivariate framework.
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