Allelopathic interactions and allelochemicals: New possibilities for sustainable weed management

被引:282
作者
Singh, HP
Batish, DR
Kohli, RK [1 ]
机构
[1] Punjab Univ, Dept Bot, Chandigarh 160014, India
[2] Punjab Univ, Ctr Environm & Vocat Studies, Chandigarh, India
关键词
agroecosystems; allelochernicals; allelopathy; biotechnological means; cover crops; crop improvement; crop residues; cropping patterns; green manure crops; natural herbicides; smother crops; sustainable agriculture; weed management;
D O I
10.1080/713610858
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Weeds are known to cause enormous losses due to their interference in agroecosystems. Because of environmental and human health concerns, worldwide efforts are being made to reduce the heavy reliance on synthetic herbicides that are used to control weeds. In this regard the phenomenon of allelopathy, which is expressed through the release of chemicals by a plant, has been suggested to be one of the possible alternatives for achieving sustainable weed management. The use of allelopathy for controlling weeds could be either through directly utilizing natural allelopathic interactions, particularly of crop plants, or by using allelochemicals as natural herbicides. In the former case, a number of crop plants with allelopathic potential can be used as cover, smother, and green manure crops for managing weeds by making desired manipulations in the cultural practices and cropping patterns. These can be suitably rotated or intercropped with main crops to manage the target weeds (including parasitic ones) selectively. Even the crop mulch/residues can also give desirable benefits. Not only the terrestrial weeds, even allelopathy can be suitably manipulated for the management of aquatic weeds. The allelochemicals present in the higher plants as well as in the microbes can be directly used for weed management on the pattern of herbicides. Their bioefficacy can be enhanced by structural changes or the synthesis of chemical analogues based on them. Further, in order to enhance the potential of allelopathic crops, several improvements can be made with the use of biotechnology or genomics and proteomics. In this context either the production of allelochemicals can be enhanced or the transgenics with foreign genes encoding for a particular weed-suppressing allelochemical could be produced. In the former, both conventional breeding and molecular genetical techniques are useful. However, with conventional breeding being slow and difficult, more emphasis is laid on the use of modem techniques such as molecular markers and the selection aided by them. Although the progress in this regard is slow, nevertheless some promising results are coining and more are expected in future. This review attempts to discuss all these aspects of allelopathy for the sustainable management of weeds.
引用
收藏
页码:239 / 311
页数:73
相关论文
共 681 条
[11]   Effect of Brassica campestris var. toria as a catch crop on Orobanche aegyptiaca seed bank [J].
Acharya, BD ;
Khattri, GB ;
Chettri, MK ;
Srivastava, SC .
CROP PROTECTION, 2002, 21 (07) :533-537
[12]  
Ahmed NE, 2001, WEED SCI, V49, P354, DOI 10.1614/0043-1745(2001)049[0354:EOFSIA]2.0.CO
[13]  
2
[14]   Allelopathic potential of rice halls on germination and seedling growth of barnyardgrass [J].
Ahn, JK ;
Chung, IM .
AGRONOMY JOURNAL, 2000, 92 (06) :1162-1167
[15]   Velvetbean (Mucuna spp.) suppresses speargrass (Imperata cylindrica (L.) Raeuschel) and increases maize yield [J].
Akobundu, IO ;
Udensi, UE ;
Chikoye, D .
INTERNATIONAL JOURNAL OF PEST MANAGEMENT, 2000, 46 (02) :103-108
[16]  
Aldrich RJ., 1984, Weed-Crop Ecology: Principles in Weed Management
[17]   Weed suppression with Brassica green manure crops in green pea [J].
AlKhatib, K ;
Libbey, C ;
Boydston, R .
WEED SCIENCE, 1997, 45 (03) :439-445
[18]  
ALKHATIB K, 1999, ALLELOPATHY UPDATE, V2, P255
[19]  
ALMENOUFI AO, 1998, CURRENT PROBLEMS ORO, P259
[20]  
ALMENOUFI AO, 1991, PROGR OROBANCHE RES, P241