Weed control using allelopathic sunflowers and herbicide

  title={Weed control using allelopathic sunflowers and herbicide},
  author={Gerald R. Leather},
  journal={Plant and Soil},
  • G. Leather
  • Published 1 February 1987
  • Biology
  • Plant and Soil
SummaryField studies were conducted to determine if season long weed control could be achieved by combining the use of an herbicide with the natural allelochemicals produced by cultivated sunflower (Helianthus annuus L.). The weed biomass was reduced equally in plots planted with sunflowers, whether or not the herbicide was applied in each of 4 years. Weed control diminished the second year in all plots that received the same treatments as had been applied the previous year. This diminished… 

Sunflower Allelopathy for Weed Control

The allelopathic potential of sunflower (Helianthus annuus L.) can be used for controlling weeds in sunflower and other crops and cultivating sunflower genotypes that could express an allelopathy activity.

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Effect of sunflower (Helianthus annuus L.) on the suppression of some summer weeds at the Field Station of the University of Zambia

Weeds present a major challenge to crop production and need to be controlled. Several methods of weed control exist but they have proved to be less than successful especially in the tropics;

Reducing the Risks of Herbicide Resistance: Best Management Practices and Recommendations

Herbicides are the foundation of weed control in commercial crop-production systems. However, herbicide-resistant (HR) weed populations are evolving rapidly as a natural response to selection

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Allelopathic Effects of Sunflower on Some Operative Components of Cotton

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Response of 33 weed species germination to allelocompounds contained in sunflower (Helianthus annuus L.)

In response to allelocompounds derived from sunower, the germination of the weeds, with few exceptions, was delayed and reduced, with complete inhibition in some cases, which depended on the weed species and on the concentration used.

Alternative Weed Control Methods: A Review

Weed interference is one of the most important limiting factors which decrease crop yields and consequently global food production and there was a shift in control methods toward high input and target-oriented ones in the early 1930s.



Weed control using allelopathic crop plants

  • G. Leather
  • Biology, Medicine
    Journal of Chemical Ecology
  • 2004
The use of crop plants with increased allelochemical production could limit the need for conventional herbicides to early season application with late season control provided by the crop.

Exploitation of allelopathy for weed control in annual and perennial cropping systems

A variety of crops, cultivars, and accessions have been evaluated over the past six years for superior capability to suppress weed growth. The most successful of these approaches has been to grow

Allelopathic Effects of Cultivated Sunflower on Grain Sorghum

Allelochemicals released from sunflower plants and residue are suggested as a possible explanation for yield reductions in crops which follow sunflower plantings.

Sunflowers (Helianthus annuus) are Allelopathic to Weeds

Laboratory, greenhouse, and field studies were conducted to determine the allelopathic potential of sunflower (Helianthus annuus L.) cultivars to suppress weed germination and growth. Germination of

Competitive and Allelopathic Effects of Sunflower (Helianthus annuus)

In the field, soybeans required 4 to 6 weeks free of sunflower competition for maximum yield, and in greenhouse studies, soybean height, fresh weight, and dry weight were significantly reduced at certain sunflower and soybean densities and levels of competition.

Common Sunflower (Helianthus annuus) Interference in Onions (Allium cepa)

Common sunflower (Helianthus annuus L.) interference in onions (Allium cepa L. ‘Yellow Granex PRR’) was studied at different weed densities and periods of interference. Onion yields were reduced when

Inhibitory Effects of Confection Sunflower Hulls1

Sunflower hull material from Sunflower (Helianthus annuus L.) was unsuccessful as an amendment in potting mixtures because of inhibition to top and root growth. Aqueous and methanol extracts from

The relationship of tissue chlorogenic acid concentrations and leaching of phenolics from sunflowers grown under varying phosphate nutrient conditions

The influence of phosphate deficiency on polyphenol concentrations in plants and their possible role in allelopathic interactions between plants are discussed.

Autointoxication mechanism ofOryza sativa I. Phytotoxic effects of decomposing rice residues in soil

It was concluded that the growth of rice seedlings was retarded by decaying rice residues in soil; thus, this appeared to be an autointoxication phenomenon.