Читать книгу Cornell Nature-Study Leaflets - New York State College of Agriculture - Страница 22
Seventh Grade.
ОглавлениеThe study of this entire year may be the relation of insects to flowers. Most of the references are given in the Plant-life work for this grade.
The insect work may be limited to: What insects visit flowers? How do they carry pollen? How does each kind of insect reach the nectar? Which insects are robbers, and which are true pollen carriers? The use of pollen by insects. Outdoor Studies, pp. 7-12.
Take up the study of golden rod and its insect visitors, i. e., let the pupils watch a bunch of golden rod and note all the insect visitors. For directions concerning this work see Outdoor Studies, pp. 29-46.
In the same way take up the study of asters and the late flowers, and their insect visitors. Describe the visitor; what it does; what part of the plant it visits.
Summary of objects and methods.—The object of this whole year's work is to show the beautiful inter-relation between insects and flowers. The studies must necessarily be made in the field. But many delightful lessons may be given on the structure of flowers, that make of greatest use to the flowers the work of insect visitors.