Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Could rice be the source for a natural herbicide?


Scientists are examining which genetic characteristics of rice best control the growth of a common weed.

The growth of rice (Oryza sativa L.) is of great agricultural importance but it is affected by the common weed, barnyardgrass (Echinochloa crus-galli). Scientists from the Department of Crop Science at Konkuk University examined the use of rice allelopathic potential for weed control.

A laboratory bioassay using water extracts was conducted to determine the alleopathic potential of different parts of rice crop on seed germination and growth of barnyardgrass, and to select high allelopathic potential rice varieties using genetic characters and phenotypes.

The alleopathic potential was evaluated from extracts of leaf, straw and hull of 114 rice varieties, i.e. the first group was of leaf extracts and its inhibition rate was the highest in CUBA 65-v-58, the second group of straw extracts was observed with inhibition rate highest in Dangneunbangju and third group of rice hull extracts was observed with inhibition rate highest in Baekambyeo.

Another part of the study examined comparison of allelopathic rice varieties: using genetic characters and phenological types; from different origins; with different maturity times; with the existence or non-existense of hull color; with the existence or non-existense of an awn or awn color. Scientists have observed about 114 rice varieties with different parts of plant i.e. allelopathic effects of extracts from leaves, straw and hull on barnyardgrass. The study is published in the July-August 2003 issue of Agronomy Journal

Ill-Min Chung, project leader, stated, "These results suggest that rice body parts may be a source of natural herbicides and that it is necessary to develop acceptable selection standard, there may also be genetic variation in rice varieties for their allelopathic potential on barnyardgrass. In the future it might be possible to develop rice varieties with high allelopathic potential."

Agronomy Journal, is a peer-reviewed, international journal of agriculture and natural resource sciences published six times a year by the American Society of Agronomy (ASA). Agronomy Journal contains research papers on all aspects of crop and soil science including agroclimatology and agronomic modeling, military land use and management, environmental quality, international agronomy, agricultural research station management, and integrated agricultural systems.

The American Society of Agronomy (ASA), the Crop Science Society of America (CSSA) and the Soil Science Society of America (SSSA) are educational organizations helping their 10,000+ members advance the disciplines and practices of agronomy, crop and soil sciences by supporting professional growth and science policy initiatives, and by providing quality, research-based publications and a variety of member services.

Sara Uttech | EurekAlert!
Further information:

More articles from Agricultural and Forestry Science:

nachricht Algorithm could streamline harvesting of hand-picked crops
13.03.2018 | University of Illinois College of Engineering

nachricht A global conflict: agricultural production vs. biodiversity
06.03.2018 | Georg-August-Universität Göttingen

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

Im Focus: Surveying the Arctic: Tracking down carbon particles

Researchers embark on aerial campaign over Northeast Greenland

On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...

Im Focus: Unique Insights into the Antarctic Ice Shelf System

Data collected on ocean-ice interactions in the little-researched regions of the far south

The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...

Im Focus: ILA 2018: Laser alternative to hexavalent chromium coating

At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.

When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...

Im Focus: Radar for navigation support from autonomous flying drones

At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.

Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

International Virtual Reality Conference “IEEE VR 2018” comes to Reutlingen, Germany

08.03.2018 | Event News

Latest News

Wandering greenhouse gas

16.03.2018 | Earth Sciences

'Frequency combs' ID chemicals within the mid-infrared spectral region

16.03.2018 | Physics and Astronomy

Biologists unravel another mystery of what makes DNA go 'loopy'

16.03.2018 | Life Sciences

Science & Research
Overview of more VideoLinks >>>