Banks grass mite (Oligonychus pratensis) abundance on sorghum cultivars with different levels of nitrogen use and metabolism efficiency

1990 ◽  
Vol 9 (3-4) ◽  
pp. 177-182 ◽  
Author(s):  
T. L. Archer ◽  
A. B. Onken ◽  
E. D. Bynum ◽  
G. C. Peterson
Keyword(s):  
Nitrogen Use ◽  
Oligonychus Pratensis ◽  
Banks Grass Mite ◽  
Different Levels

Banks Grass Mite, Oligonychus pratensis (Banks)

2008 ◽  
pp. 378-378
Author(s):  
Colin Berry ◽  
Jason M. Meyer ◽  
Marjorie A. Hoy ◽  
John B. Heppner ◽  
William Tinzaara ◽  
...  
Keyword(s):  
Oligonychus Pratensis ◽  
Banks Grass Mite

scholarly journals Rapeseed: how to value varieties with higher nitrogen use efficiency in France

OCL ◽  
2019 ◽  
Vol 26 ◽  
pp. 26 ◽  
Author(s):  
Edwige Charbonnier ◽  
Aline Fugeray-Scarbel ◽  
Stéphane Lemarié
Keyword(s):  
Nitrogen Use Efficiency ◽  
Value Chain ◽  
Rapeseed Oil ◽  
Biodiesel Production ◽  
Greenhouse Gas Balance ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Different Levels ◽  
Gas Balance ◽  
Detailed Presentation

This article focuses on the interest in improving the nitrogen use efficiency of rapeseed varieties in France. We show that this trait is of interest at different levels of the value chain and for different markets. Nitrogen use efficiency improves farmers’ margins by reducing fertilizing costs or increasing yields. Nitrogen use efficiency also improves the GHG (greenhouse gas) balance of rapeseed used for biodiesel production and the image of edible rapeseed oil for consumers within the framework of specific labels. Finally, nitrogen use efficiency can also be seen as a trait that improves the protein content of rapeseed oilcake and, therefore, increases its value compared to competing sources of protein. After a detailed presentation of these different valuations, we provide current or possible measures that have been or could be implemented to encourage different actors in the sector to develop and diffuse this trait.

Emission estimation of nitrous oxide (N2O) from a wheat cropping system under varying tillage practices and different levels of nitrogen fertiliser

Soil Research ◽  
2016 ◽  
Vol 54 (6) ◽  
pp. 767 ◽  
Author(s):  
Nirmali Bordoloi ◽  
K. K. Baruah ◽  
P. Bhattacharyya
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Use Efficiency ◽  
Wheat Variety ◽  
N2o Emissions ◽  
Nitrogen Use ◽  
Nitrogen Fertiliser ◽  
Tillage Practices ◽  
Significant Difference ◽  
Use Efficiency ◽  
Different Levels

Nitrous oxide is a greenhouse gas with high global warming potential emitted from agricultural sources. The effects of tillage practices and different levels of N fertiliser on seasonal fluxes of N2O were investigated in a field planted with the wheat variety Sonalika. The experiment was conducted during 2012–13 and 2013–14 under conventional tillage (CT) and reduced tillage (RT) farming systems in combination with four different levels of nitrogen fertiliser (i.e. zero nitrogen (F1), 60kgNha–1 (F2), 80kgNha–1 (F3) and 100kgNha–1 (F4)). Both tillage practices and fertiliser significantly (P<0.01) affected seasonal cumulative N2O emissions and wheat yield. However, there was no significant difference in N2O emissions between RTF1 and CTF1 (zero nitrogen). Compared with RT, N2O emission decreased under the CT practice by 2.49%, 10.11%, 7.9% and 27.46% in CTF1, CTF2, CTF3 and CTF4 respectively. Highest and lowest seasonal cumulative fluxes were recorded in RTF4 (N 100kgha–1) and CTF1 (N 0kgha–1) respectively. During the wheat-growing period, nitrogen use efficiency decreased with increasing nitrogen levels and treatment with 60 kg-Nha–1 in the CT practice (CTF2) was found to be effective in increasing nitrogen use efficiency and decreasing yield-scaled N2O emissions.

scholarly journals Banks Grass Mite (Acari: Tetranychidae) Suppression May Add to the Benefit of Drought-Tolerant Corn Hybrids Exposed to Water Stress

2020 ◽  
Author(s):  
Alice Ruckert ◽  
Julian R Golec ◽  
Cody L Barnes ◽  
Ricardo A Ramirez
Keyword(s):  
Water Stress ◽  
Spider Mite ◽  
Corn Hybrids ◽  
Development Of Resistance ◽  
Drought Tolerant ◽  
Oligonychus Pratensis ◽  
Dry Conditions ◽  
Mite Infestations ◽  
Arid West ◽  
Banks Grass Mite

Abstract Spider mite (Acari: Tetranychidae) outbreaks are common on corn grown in the arid West. Hot and dry conditions reduce mite development time, increase fecundity, and accelerate egg hatch. Climate change is predicted to increase drought incidents and produce more intense temperature patterns. Together, these environmental shifts may cause more frequent and severe spider mite infestations. Spider mite management is difficult as many commercially available acaricides are ineffective due to the development of resistance traits in field mite populations. Therefore, alternative approaches to suppress outbreaks are critically needed. Drought-tolerant plant hybrids alleviate the challenges of growing crops in water-limited environments; yet, it is unclear if drought-tolerant hybrids exposed to water stress affect mite outbreaks under these conditions. We conducted a greenhouse experiment to evaluate the effect of drought-tolerant corn hybrids on Banks grass mite [Oligonychus pratensis Banks (Acari: Tetranychidae)], a primary pest of corn, under optimal irrigation and water-stress irrigation. This was followed by a 2-yr field study investigating the effect of drought-tolerant corn hybrids exposed to the same irrigation treatments on Banks grass mite artificially infested on hybrids and resident spider mite populations. Results showed that water-stressed drought-tolerant hybrids had significantly lower Banks grass mite and resident spider mite populations than water-stressed drought-susceptible hybrids. Interestingly, water-stressed drought-tolerant hybrids had equal Banks grass mite populations to drought-susceptible and drought-tolerant hybrids under optimal irrigation. We posit that planting drought-tolerant hybrids may suppress spider mite outbreaks in water-challenged areas.

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