Wheat borer and corn weevil are the most harmful pests in the storage process of corn seeds, and physical and chemical methods can be used to control them during storage. The research shows that when the temperature reaches 50℃, all kinds of storage pests can die within 5 ~ 6 h.
Therefore, physical methods such as solarization, winnowing and screening can be used to eliminate pests in storage. The chemical method is to kill stored pests with chemicals. Practice has proved that aluminum phosphide has a strong lethality to all kinds of storage pests, and also has a certain inhibitory effect on microbial activities.
Extended data:
Embryo: the larva of a new plant, which constitutes the most important part of the seed. Embryo consists of radicle, embryo, hypocotyl and cotyledon (peltate). There are growing points at the top of radicle and embryo, which are composed of embryonic cells.
When the seeds germinate, these embryonic cells can divide and grow rapidly, so that the radicle and germ are elongated respectively, breaking through the seed coat and growing into roots, stems and leaves of new plants. At the same time, hypocotyls also grow together and become a part of young roots or young stems.
Cotyledon is the earliest leaf in plants and one of the components of seed plant embryos. In most plants, it is an organ for storing nutrients or assimilating during seedling stage. (Seeds without endosperm have very thick cotyledons and store a lot of nutrients. In seeds with endosperm, cotyledons are underdeveloped, but they can absorb nutrients from endosperm for embryo development.
Therefore, cotyledons play a very important role in the early stage of seed germination and seedling formation. Cotyledons in the seeds of Gramineae plants, also known as "inner cotyledons" or "shields", have special functions, including absorption and digestion. The embryo of maize accounts for 10%- 15% of the total seed weight.
Baidu Encyclopedia-Corn Seed