Treesearch

Resistance to damage from freezing temperatures is one of the most adaptive properties of "evergreen" (shoot bark, felloderma, needles) woody and bush plant tissues. Species-specific processes accompanying transition of chloroplasts to a frost resistant state (reduction of photochemical activity, the change of chemical structure and structural organization of thylakoid membranes) determine criterion for estimation of its seasonal dynamics. Information on the degree of frost resistance of chloroplasts is necessary for successful introduction of plants, and also important in determining...

This year-1999, now in its 7th month-is well on its way to becoming the hottest year in what has already been documented as the hottest decade on record both in the United States and worldwide. This makes a good setting for discussing global climate change, a much better setting than, say, the second week of a record-setting cold spell in February, 1999 when some climate change conferences were held, when one wondered if the locals might turn out at any moment carrying signs reading "Welcome Global Warming

The current stage of societal development is characterized by ecological deterioration, with the application of chemicals for the prevention of pests and plant diseases giving rise to new problems in environmental protection.

We review the basic concepts of science and research and the scientific process. Using an example from a bareroot nursery, we show how a practical research project can be done at any type of nursery, meshing sound statistical principles with limitations of busy nursery managers.

Hawaii has the dubious distinction of being the extinction capital of the United States with close to 30 percent of native plant species listed as endangered. The National Tropical Botanical Garden has been a leader in efforts to propagate and conserve native Hawaiian plants with close to 800 species collected for ex situ conservation since 1990. Propagation methods have been determined for more than 500 species, including many which have never been cultivated before. Examples of the successes and challenges of propagating extraordinarily rare native Hawaiian plants will be presented.

We use certain microbial inoculants in the nursery as a part of supporting the objectives of accelerating rehabilitation of degraded land and ecosystem function, as well as reducing costs in establishment and maintenance of forest plantings. Microbial inoculants re-create natural partnerships between plants and some of the beneficial microorganisms that support plants. Using microbial inoculants is a way to reintroduce some naturally occurring microorganisms that support the productivity of plants in nature. In our nursery, we work with both rhizobia and mycorrhizal inoculants.

Forest seedling production in British Columbia began with bareroot production in the 1930s and has evolved to be 95'/0+ containerized entering the new millennium. Until the late 1970s most production was limited to government facilities. Currently private industry produces 85% of seedlings planted in British Columbia. Production levels are at approximately 300+ million seedlings annually, with 225 million destined for British Columbia lands and 75+ million seedlings are contract grown for customers in other Canadian provinces and US states.

Cascade Forestry Service, Inc., is a private reforestation nursery and service company that has grown from a shoestring operation into an employee-owned company that both produces reforestation trees and assists landowners with forestry development and management. The Northeastern Forest and Conservation Nursery Association has proven instrumental in Cascade Forestry's growth and development, particularly through allowing us to participate in their annual meetings. We thank the Iowa Department of Natural Resources for inviting us to cohost this year's meeting. After all, as members of the...

There is a distinct lack of technical information on the propagation of native tree species from the dry tropical forest ecosystem in Mexico. This ecosystem has come under heavy human pressures to obtain several products such as specialty woods for fuel, posts for fences and construction, forage, edible fruits, stakes for horticulture crops, and medicinal products. The forest nurseries of the Government propagate only a limited number of native species to carry out forest plantations, and some of them are dangerous species. The objective of this paper is to present information to propagate...

The Food Quality Protection Act (FQPA) of 1996 has placed new standards on the registration and regulation of pesticides intended to protect children. The most significant changed mandated by FQPA relate to the registration process termed the "Risk Cup." This approach to risk analysis has resulted in greater restrictions on the application of pesticides used in forestry and in the lost of uses critical to natural resource management. This paper will discuss the current status of pesticides available for use in forest nurseries in the United States. The paper will also cover the potential...