109 – 117 of 715 Results
Insecticide Resistance Management--USB TakeAction
The USB has compiled resources that provide guidance for preventing or delaying the development of insect resistance to current insecticides.
Herbicide Resistance Management--USB TakeActioin
The USB has prepared resources that provide guidance for managing herbicide-resistant weeds and for preventing or delaying the development of weed resistance to herbicides.
64-2021Improving Herbicide Efficacy and Residue Penetration of Herbicides Using Common Adjuvants for Weed Control in Soybean Annual Report
Adjuvants are a necessary part of making herbicide programs work effectively for the control of broadleaf weeds and grasses, the first time. With decreasing economic margins, improving the return-on-investment for anything purchased for the spray tank must improve for long-term viability. Herbicide resistant weeds have led to increased problems for weed management in soybean production, resulting in a greater investment of money and time to effectively manage these populations. Each time a weed population is not effectively controlled, it risks contributing to the persistence of herbicide resistant weeds. This proposed project would explore commonly available adjuvants from Mississippi retailers to evaluate overall herbicide efficacy and weed control.
63-2021Determining Duration of Residual Control of Soil-applied Herbicides to Form Total Preemergence Herbicide Programs in Soybean Annual Report
: Currently, growers in Mississippi are faced with the issue of producing soybean crops while competing against 23 individual combinations of weed species by site of action herbicide resistance. Managing populations of herbicide resistant weeds have severely cut into profit margins of producers as these weeds are more difficult to control. Palmer amaranth (Amaranthus palmeri L.) is among the most resilient and difficult weed species to manage, and it has been documented to have multiple resistance traits.
62-2021Improving dryland soybean yield, profit and health of dominant soils across Mississippi Annual Report
limitation for dryland soybean production often resulting in low and inconsistent grain yield. Researchers have demonstrated that a 1% increase in soil organic matter (SOM) can improve soil water holding capacity by 20%. Thus, any management practice that increases SOM is likely to improve soil water holding capacity and water infiltration rate and conserve more rain water in the soil.
56-2021Evaluation of the Effects of Early Season Flooding on Soybean Growth and Yield, Physiology, and Economics Annual Report
Genetic variation in flood tolerance was observed in soybean germplasm and could be used to improve current varieties to prevent substantial production losses during flood. Dr. Grover Shannon screened 350 lines for flood tolerance at the early reproductive stage and found susceptible lines lost yield about 2 times the rate over tolerant lines in 2005. Two genes were identified through previous United Soybean Board (USB) supported projects to Nguyen and have been utilized to develop flood tolerant germplasm and varieties. While varieties for this breeding program have been evaluated in terms of yield response, a study of the mechanisms promoting flood tolerance has not been done.
51-2021Sicklepod Extract Formulations as Natural And Effective Deer And Insect Repellent Annual Report
Plants possess varying levels of herbivore defense mechanisms, and weeds, because of their vast genetic and phenotypic diversity, are excellent resources for anti-herbivore traits (especially against deer and insect pests). No one has tried to test the activity and effectiveness of these anti-herbivore compounds or plant extracts on crop protection. In our previously funded MSPB project, we conducted tests at the Captive Deer Facility and at The R. R. Foil Plant Science Research at MSU to confirm the anti-herbivore property of sicklepod weed extracts.
49-2021 Cover Crop Aerial Seeding and Sensor Thresholds for Irrigation Scheduling in Soybean Production annual report
A season-long static threshold of -85 kPa from soil moisture sensors for irrigation scheduling was recommended to Mississippi farmers for early-planted soybean without adversely affecting yield. In addition, the inclusion of cover crops in monoculture soybean production systems might impact soil moisture dynamics and improves irrigation water use efficiency. Cover crops reduce soil crusting and improve the infiltration of water in the soil, thus decreasing runoff and erosion losses. Cover crops reduce soil evaporation, soil bulk density, and compaction.
46-2021Evaluating cover crops to determine the best management practice for the suppression of tall waterhemp and Italian ryegrass final report
To combat herbicide resistance among weeds, non-herbicide methods of control, such as cover crops, are becoming widely adapted. Experiments were conducted to determine how to effectively establish and manage cover crops in order to suppress tall waterhemp and Italian ryegrass and to assess their overall impact on soybean growth and yield. Various cover crop establishment methods were evaluated, and it was determined that interseeding at the R7 growth stage of soybean was the least effective method for proper cover crop establishment.