daigai

Well-Known Member
Link tải luận văn miễn phí cho ae Kết nối

It is appropriate at this time to reflect on two decades of research in biological
control of weeds with fungal plant pathogens. Some remarkable events have
occurred in the last 20 years that represent a flurry of activity far beyond what
could reasonably have been predicted.
In 1969 a special topics review article by C. L. Wilson was published in Annual
Reviews of Phytopathology that examined the literature and the potential for
biological control of weeds with plant pathogens. In that same year, experiments
were conducted in Arkansas that determined whether a fungal plant pathogen
could reduce the infestation of a single weed species in rice fields. In Florida a
project was under way to determine the potential use of a soil-borne plant pathogen
as a means for controlling a single weed species in citrus groves.
Work in Australia was published that described experiments that sought to
determine whether a pathogen could safely and deliberately be imported and
released into a country to control a weed of agricultural importance. All three
projects were successful in the sense that Puccinia chondrillina was released into
Australia to control rush skeletonweed and was released later into the United
States as well, and that Colletotrichum gloeosporioides f.sp. aeschynomene and
Phytophthora palmivora were later both marketed for the specific purpose of
controlling specific weed species.
These three successes sparked interest worldwide, and today similar projects
are found on six of the seven continents, Antarctica being the exception. Several
world conferences on biological control of weeds have been held in the last 20
years that included reports of work with plant pathogens. Several professional
societies now have standing committees whose members include those working
on biological control of weeds with plant pathogens.
The emergence of genetic engineering captured the attention of the world
during these two decades. Genetic manipulation of filamentous fungi, including
fungal plant pathogens, with recombinant DNA techniques was demonstrated.
And these techniques became part of several projects on biological control of
weeds. Several recent papers have already discussed mechanisms for "improve-

Link Download bản DOC
Do Drive thay đổi chính sách, nên một số link cũ yêu cầu duyệt download. các bạn chỉ cần làm theo hướng dẫn.
Password giải nén nếu cần: ket-noi.com | Bấm trực tiếp vào Link để tải:

 

Các chủ đề có liên quan khác

Top