Recently, readers from Longyin and Ningjin came to the telephone to report that there were snails in the cotton fields and vegetable fields. The effect of pesticides to fight pests and insect pests was unsatisfactory, and the catch was also inexhaustible. After a rain came out, they asked how to prevent and treat them. .
Dr. Zhao Guofang, plant protection and phytosanitary station of Hebei Province, answered: Due to the relatively abundant rainfall and soil moisture this year, combined with the increase in crop intercropping area, there are more debris in the field, resulting in greater occurrence of snails in some areas, and prevention and control should be strengthened. Its reproductive damage characteristics and prevention methods are as follows:
I. Characteristics of breeding damage Snails live in winter in fields, earth seams, fallen leaves, weeds, or rocks. In the second year of March, activities begin in the middle of the day, usually hidden in low-lying areas, and in the evening or early morning, while cloudy days are all day. During May-June, mating and spawning occurs. Eggs are piled in the roots of the crop, near the grass roots, or under the stones. There are two events in the year that are at the height of the disaster and June to July are the first ones. August high temperature, snail activity weakened. In September, the temperature was cool, and it was once again entering the event of a catastrophic event. In warm and rainy weather, the damage to the crops was even more severe. Winter begins in November.
The landslide of the snails is widespread and the main crops are cotton, corn, soybeans, fruit trees, flowers and vegetables. The teeth and leaves, stems, buds, and fruits caused by their teeth to cause cavities and nicks. In severe cases, light-seeded leaves cause dead seedlings. Occasionally, the reproductive organs of the crops are bred to affect pollination. At the same time, it secretes mucus and contaminates crops, causing infection by harmful germs and causing other diseases.
Second, control methods
1. Manually kill. In the evening, morning or cloudy days, the snails and slugs on the plants are trapped and concentrated, or they are trapped with branches, weeds, and vegetable leaves to lurk in the trap. Kill.
2. Thoroughly remove field weeds, straws, stones and other habitats where they can inhabit, and sprinkle quicklime to reduce the scope of their activities; timely cultivator, turn loose soil, so that the eggs and body exposed to the soil surface, in the sun Sun died.
3. Prior to spawning or when there is a small snail, mu is used for trapping and killing with 400 grams of Swiss imported 6% Mita snail granules (tetraaldehyde).
Microspheres For Life Sciences
Product List
01 Latex (Polystyrene) Beads
WhitePolystyrene BeadsDyed Polystyrene Beads
Fluorescent Polystyrene Beads
Magnetic Silica Beads
Magnetic Polymer Beads
Magnetic AgaroseBeads
Silica Beads
Size Standard Particles
Microspheres for Life Sciences
Suzhou Nanomicro Technology Co., Ltd. , https://www.nanomicro-technology.com