The soybean cyst nematode (SCN; Heterodera glycines) and brown stem rot (BSR) fungus (Phialophora gregata) are serious pests of soybean, occurring over a range of soil types and soil pH. Often found in the same field, management strategies implemented to control one pathogen may in fact exacerbate damage caused by the other. As soybean acreage has increased, the duration between soybean crops h...

1) Moth Trapping. Despite the use of Bt-transgenic cotton on over 98% of the acreage in Tennessee, bollworm and tobacco budworm still compose an important pest complex. Bollworms may cause significant economic damage to Bt cotton fields, and the bollworm/budworm can be even more damaging to non-Bt cotton. More importantly, the threat of tobacco budworm infestations results in high adoption of B...

In California, first-generation table grape vineyards were planted on their own roots. But in recent years growers have been replanting onto acreage previously in grapes more often. Grafted plants are being sought to overcome nematodes and other site-related problems. We investigated the etiology of the decline and death of ‘Redglobe’ table grape scions propagated on different rootstocks, using...

—Since the late 1920's there have been periodic control programs on black-tailed prairie dogs in Wind Cave National Park. The most recent control effort, which began in 1982, resulted in the reduction of total dogtown acreage from 2,000 to 750 acres. Recent studies carried out within the park have provided managers with more soundly based justification for carrying out control programs. The sam...

Arizona is the first state in the nation to regulate agricultural practices in order to reduce dust emissions near urbanizing areas. This BMP program requires dust mitigation actions in some combination of tillage and harvest, crop land, and non-crop land activities. Contingent valuation methods were used to estimate the willingness-to-adopt reduced tillage equipment. At $10-26 per acre in long...

Small area estimation is a powerful modeling technique in which ancillary data can be utilized to “borrow” additional information, effectively increasing sample sizes small spatial, temporal, or categorical domains. Though more commonly applied biophysical variables within the study of forest inventory analyses, also implemented context understanding social values, behaviors, and trends among t...

Water is an essential yet constrained commodity for human communities and ecological systems depend on it. With population growth and economic development, water resource is increasingly declining. Over the past two decades, because of changes in population and climate, and relative welfare increase, the per capita consumption of water has increased. Thus, optimal use of available water resourc...

Aspen has been an ecologically important, though relatively minor, component of the Lake States (Michigan, Wisconsin, and Minnesota) forests for millennia. General Land Office records from the 1800s indicate that aspen comprised a small fraction of the region’s eastern forests, but was more extensive on the western edge. Then Euro-American settlement in the 1800s brought land clearing, timber h...

The objective of this analysis was to integrate hydrologic, agronomic, and economic methods evaluate various management strategies by changing crop acreage better manage the declining resources Ogallala aquifer. A non-linear optimization model used estimate optimal water use, mix, yield, net returns over a 50 year period under dryland deficit irrigation scenarios in Texas High Plains. Results i...

Food security and economic welfare strongly depend on agricultural production, the loss of this production can be a serious challenge for food security and economic welfare. Agricultural production is also influenced by environmental and climatic factors so that the variations of climatic parameters can trigger extensive fluctuations in agricultural production. This study classifies climate cha...