Phytophthora species consistently rank as some of the most devastating disease agents in Massachusetts farms. Two species, P. infestans and P. capsici, attack regionally important vegetable crops, including cucurbits, peppers, tomatoes, eggplant and potatoes. In 2007, over 8,000 acres of vegetable crops susceptible to infection by P. capsici and P. infestans were harvested in Massachusetts.
The agricultural community needs to improve nutrient use efficiency for modern cropping systems to ensure agronomic viability and environmental quality. Improving efficiency will require more than new technology. It will require a different approach to nutrient management: the use of adaptive management concepts and processes. Expected outcomes/impacts of this work include:
We worked with Massachusetts growers on a broad range of activities related to Integrated Pest Management for diversified vegetable and fruit farms. One of the core components of this project is working with several 'mentor farms,' who grow both fruits and vegetables and are open to expanding their use of advanced integrated pest management techniques as well as working with us to better understand how a diversified farm can use IPM. We also conducted field trials on-farm and at our research farm on IPM methods identified by growers as their priorities each year.
Fire blight is a major threat to apple production in USA. It can destroy thousands of high density trees per farm in epidemic conditions. Our priority is to address this threat by development of pest risk assessment through quantifying survival of fire blight bacterium Erwinia amylovora in wood cankers as main sources for infection. We will determine its survival in relation to apple and pear cultivar susceptibility, tree drought stress, and winter cold. Current fire blight prediction models assume successful fire blight survival in cankers every year.
Dual-use systems are still novel, and to a degree experimental. What agricultural activities are most compatible with dual-use is not well understood, nor is whether the new incentive will be sufficient to spur significant adoption of dual-use cropping systems. UMass has important roles in the development and adoption of dual-use systems. First, UMass Extension will serve as a clearinghouse of information and an educational resource for the agricultural and solar energy communities regarding the new technology and new incentive program.
Experiments will be conducted in the greenhouse and in the field with leafy vegetables to investigate if the mineral nutrient content of these foods can be enriched through fertilization of the crops. This research will address investigations of mineral nutrients, suggested to include phosphorus, calcium, magnesium, potassium, iron, manganese, copper, and zinc, which the investigators have the capability of analyzing in their laboratories. The research will emphasize investigations with lettuce that can be cycled rapidly in greenhouse or field production.
Classical biological control provides a sustainable, green method of controlling invasive pests permanently. The number of such pests increases yearly with each new invasion. The separate objectives in this project address a series of such invaders. The intended outcome of each objective (project) is to safely and permanently lower the density of the pest and avoid the damage it causes. Outcomes will be healthier forests and other natural ecosystems and reduced pesticide use in crops.
Our goal is to identify molecular interactions between mammal hosts and African trypanosomes that affect the development of protective immune responses as well as pathophysiologic processes. African trypanosomes are flagellated protozoa that cause sleeping sickness in people and Nagana in domestic animals. These diseases are fatal if left untreated. The diseases are endemic in the humid and semi-humid zones of Africa affecting a landmass of 10 million km 2 and 36 countries.
It is known that legumes generally respond to existing N in the soil. When soil N is relatively high, legumes prefer to use soil N rather than to engage in symbiosis with rhizobia. However, the ecophysiological responses of legumes to existing soil-N level and the changing climate - including temperature changes and precipitation dynamics impact rhizobia nodulation - have not been studied in actual field conditions. This study seeks to understand these responses in order to improve N management, maximize the benefits of legumes, reduce off-farm inputs, and enhance soil health.