It is also more competitive against weeds than similar grasses.

With high seeding rates, these independently noncompetitive seedlings become competitive against weeds because of their density.

Several research results confirm the high effectivness of humid heat against weeds and its seeds.

It can hold its own against shrubby weeds like steeplebush and raspberries.

How to wage war against weeds, and what to do with the unusual varieties .

The control species can be used to protect the crops against pests and weeds.

This builds up the lawn's root system and protects it against weeds and drought.

And that, he said, depends on how long Roundup herbicide remains effective against weeds.

So far, most of the inventions of agricultural biotechnology have been new weapons for farmers in their fight against insects and weeds.

Earlier in the year, wherever you looked, whatever you read, gardeners were complaining of the constant battle against weeds.