Question

Demerits of plant introduction

Answer 1

Explanation:

The main demerit of this method is that there are chances of the entry of new diseases, insects and weeds in the country along with the introduced material. For example, Argimone mexicana weed, late blight of potato, bunchy top of banana, and coffee rust disease, and woolly aphis of apple and potato tuber moth insects were introduced in India along with introduced material. However, all these entered before the establishment of quarantine organization. Now chances of entry of new insects, diseases and weeds are remote due to quarantine regulations and checkup.