Quiz by instructor and grade for weed collection. Many weeds can be enjoyed for their attractive flowers and interesting seed pods. Weeds quickly grow to cover unsightly scars made to the landscape by man or nature.
Weeds reduce crop yields and increase the cost of producing crops.
Some weeds are poisonous and others may cause allergies. For a grower or gardener to do an effective job of controlling troublesome weeds, exact identification of the weed pest is important. The selection of the most effective control method depends on one's ability to properly identify the problem pest species. The purpose of a weed collection is to help the person making the collection more adept at identifying weeds. A simple way to began to identify some common weeds is to compare your specimens with drawings and colored photographs using references such as those listed at the beginning of this unit.