This development is different from that observed in most annual crop plants.

He is best known for showing how and where crop plants evolved.

Adults develop later in the season and also feed on crop plants.

Gradually, all the weeds look more like the crop plant.

But they don't have any of the symptoms that we usually see in crop plants with viruses.

For growing crop plants the following conditions must be present:

The first commercial sales of genetically altered crop plants are not expected until 1994 or 1995.

Weeds compete with crop plants for water, nutrients and light.

Proteas have special growing requirements like any other crop plant.

Weeding often takes place when the crop plant is very young, and most vulnerable.

One was the great success of farmers in breeding cattle and crop plants.

By engineering a crop plant with a similar trait could it control weeds in the same way?

They also cause food to decay and crop plants to become diseased.

Transfer of this approach to other crop plants could provide significant improvements in productivity.

As Table 8.6 shows, two further plant attributes are being exploited to produce new crop plants.

Each week the programme looked at a different group of crop plants or techniques suitable for home gardening.

Together, these would have created a shearing action for cropping plants.

That wasn't thought to be much of a danger because most crop plants are self-fertilizing.

At the same period, host specificity tests were conducted using most of the important crop plants.

He has spent 25 years collecting crop plants and their wild relatives in tropical America.

Rice is the first crop plant whose genome has been decoded.

Also the abrasive effect of the storm damages young crop plants.

One way, if there is no machinery available, are the hand tools you need for the hard to get weeds close to the crop plants.

Crop Plant: the plants that you have decided you can grow and market.

Today the area is still home to a tremendous variety of crop plant types and their wild relatives.