136 – 144 of 737 Results
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.
40-2021Evaluating Nutrient Availability Following Cover Crops in Mississippi Soybean Production Systems annual report
. Insufficient P or K availability in soils result in lower soybean yields than the achievable maximum. A previous large scale study conducted throughout Mississippi determined that soybean yields could be increased by an average of 8 to 10 bushels with the addition of P2O5 or K2O fertilizers when soil nutrient values were determined to be insufficient by the state soil testing lab. With this information available, no research has been conducted in Mississippi to determine how cover crops may affect the subsequent soybean crop when P or K may be limiting, and how these cover crop systems may interact with a fall P or K fertilizer regime.
39-2021 Development of a predictive model to determine the influence of weather on the northern range expansion of redbanded stink bug annual report
Understanding how weather impacts RBSB abundance and distribution was achieved through (i) the continuation of monitoring to delimit the annual range of this pest and (ii) targeted investigations of the environmental conditions that lead to annual changes in pest abundance across the landscape. Ultimately, we hope to use this information to forecast annual potential impacts from redbanded stink bug.
33-2021 Developing Improved Soybean Lines for Seed Composition, Quality, and Heat Tolerance in Mississippi Final Report
To our knowledge, there are no commercial soybean cultivars that are heat-tolerant with high levels of seed composition (seed protein, oil, and minerals) and quality components (reduced seed damage including reduced green seed, seed wrinkling, hard seed, and diseased seed). Therefore, developing heat tolerant germplasm with high seed composition and quality is essential.
32-2021Development of Molecular Diagnostic Method for the Diamide Resistance in Soybean Looper Annual Report
the goal of this project is to develop a rapid and accurate diagnostic method based on DNA sequences to screen populations of soybean looper for resistance to diamide insecticides. To achieve this goal, we postulate four objectives for year 1 with a fifth overall project objective that will be initiated in years 2 and 3.
29-2021Delta Agricultural Weather Annual Report
The Center has continued to build its network throughout the state of Mississippi. The Center added 5 full new weather stations to its network. This has increased our network to 31 stationary stations. All data can be viewed every in real time, hourly and daily readings are archived for past viewing.