Дополните диалог:
Marsh: What “pests” threaten crops?
Weston: Agronomists use the world “pests” in referring to weeds. Do you know what 1_______ are?
Marsh: Weeds are the plants out of place. They compete with the main crops for nutrients, sunlight and water.
Weston: Besides the weed may be narrow leaf weed, broad leaf weed and sedges which may be annual, biennial or perennial depending upon its life cycle.
Marsh: 2______?
Weston: Insects cause damage by chewing, sucking or piercing plant parts. Did you hear about nematodes?
Marsh: 3_______.
Weston: Nematodes are tiny parasitic worms which are microscopic in nature and invisible to the naked eye. They 4_______ in the plant root system which appears as galls or swollen points on the root system. The injured part may serve as the entry point for several diseases.
weeds
And what about insects
No, I didn’t
cause damage
