Recently, continuous rains occurred in Jinan, Dezhou, and Dongying areas in Shandong Province. Heavier snails in fields and in orchards due to weather are more severe. In recent days, the author discovered that many winter jujube leaves suffered damage from snails in a winter jujube garden in Zhanhua. On some green plants in urban parks, snails are also seen as a pile of hazards. In the vegetable fields, the snails are more harmful and the vegetables are subjected to snail damage at the seedling stage. , Lightly caused damage to the leaves and stalks, late seedlings, seedlings rate decreased; weight will eat all the seedlings, resulting in no seedlings into pieces. Therefore, prevention and treatment of snails should not be taken lightly.
Now that there are not many pesticides that are specially used to control snails, and because snails have habits that are nocturnal, it is difficult to control them during the day. However, snails have a distinct feature. They like the dark and damp environment. They are afraid of direct sunlight, especially after they have rained. They can all be carried out and can cause harm to almost all green plants. Therefore, it is relatively easy to catch more rain in the summer and use the daytime and evening time to control snails in rainy and wet weather.
Snails occur once a year, and adults and larvae live in wet and dark places such as vegetable fields, green manure fields, bushes, and crop roots. Gradually began to feed at the beginning of March of the following year, and the amount of eggs spawned in April-May and September was relatively large. Snails like to drill into the loose humus soil to inhabit and lay eggs for up to 12 hours. In late November, it enters the wintering state.
Prevention and control of snails should adopt comprehensive prevention and control methods:
First, according to the snail's preference for a wet climate, generally after the rain, snails are easily found on tree poles, leaves, and vegetable fields, and can be manually captured in the rain. Or after the trapping of grasses and vegetables, they are collectively destroyed, or the orchards are reared to feed chickens and ducks to feed on the worms.
The second is to clean the weeds around the park. Before planting, timely eradicate weeds in fields, loquats, and ditch, ditch and reduce moisture, and cultivator turning soil. It is best to sprinkle lime belts between the ditch, land or crops, and use 50-75 kg of lime per acre to degrade the environment in which snails grow and reproduce.
The third is chemical control. When the snail population is large and is about to enter into a dangerous period, chemical agents are used to control snails. Per acre with 6% myda killing sprue granules 0.5 ~ 0.6 kg or 3% ban worming granules 1.5 ~ 3 kg, mixed with dry fine soil 10 ~ 15 kg evenly spread in the field. Snails prefer to inhabit the ditch and wetlands to reappropriate them to minimize snail damage.
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