 |
Cyperus rotundus (purple nutsedge)
In their survey of the world's weeds, Holm et al. (1977) deduced that C. rotundus was the worst, based on its occurrence in 52 crops in 92...
|
| |
Elymus repens (quackgrass)
E. repens is a competitive weed, being able to reduce growth and production in any crop, including competitive crops such as cereals. In the...
|
 |
Spergula arvensis (corn spurry)
S. arvensis is one of the three most serious weeds of cereals in Kenya, and of wheat and barley in Finland, where, in an extensive survey, it was...
|
| |
Xanthium strumarium (common cocklebur)
X. strumarium is a major weed of row crops such as soyabeans, cotton, maize and groundnuts in many parts of the world, including North America,...
|
 |
Datura stramonium (jimsonweed)
As a weed in more than 100 countries, D. stramonium is considered by Holm et al. (1997) to be more widespread than even Cyperus rotundus which is...
|
 |
Paspalum distichum (knotgrass)
P. distichum is a fast-growing rhizomatous grass of wet areas. It has become a major weed of rice and many other crops, as well as...
|
 |
Lolium temulentum (darnel)
L. temulentum is a serious weed of winter crops, especially wheat (Bor, 1960; Angiras and Modgal, 1981), winter vegetable crops (Gad and El Mahde,...
|
| |
Amaranthus retroflexus (redroot pigweed)
A. retroflexus is an aggressive and competitive weed in a variety of row crops. It causes substantial yield loss in soyabean, maize, cotton,...
|
 |
Mikania micrantha (mile-a-minute)
Mikania micrantha is a neotropical fast growing vine that has become a major weed in SE Asia and the Pacific during the latter part of the 20th...
|
 |
Sorghum halepense (Johnson grass)
S. halepense is a perennial grass which can be cultivated for fodder, but is also an extremely invasive weed with a worldwide...
|