In recent years, snails in the Tangshan area have also begun to harm fruit trees in greenhouses, and farmers' friends should pay attention.
I. Types of local snails and the damage of plants
The local snails are mostly the same type of snails and grey snails, belonging to the gastropod stalk eyes and eyes and snails. The worms feed on sunny days from early evening to early morning. In general, autumn is more important than spring, and it is particularly serious after continuous rainfall. Feeding plant roots, leaves, fruits, stems and other parts cause harm, forming large nicks and holes, and secreting Mucus, contaminated fruit. Damaged fruit trees include peaches, plums, apricots, and strawberries.
Second, the law of the occurrence of snails
The same type of snails are often mixed with gray snails. They are born on moist grasses, on field ridges, under litters, in crop roots and earth seams, and in the vicinity of greenhouses and livestock pens. The snails can also overwinter in the soil of the winter crop roots when they are buried in the soil below the crop straw pile or in the winter crop soil. Pear trees began to bloom before flowering, hidden during the day in the shade branches, defoliation, weeds, soil and other dark and humid humus more adaptable. Mostly after spawning (between April and May in open field) spawning, most of them are produced in the loose and moist soil gaps and under dead branches and stones. Each adult can produce 30-235 eggs.
Third, snail prevention and control methods
1. Artificial trapping. Thoroughly clean up the places where snails and debris can be found where snails are inhabited; weeds such as weeds, leaves, stones, and leaves are collected during sunny daylight hours, or the grass is placed on trunks to allow the snails to reach the trees. Go to the straw handle and remove the grass at night to burn it.
2. The floor covered.
3. Using cotton velvet dipping diesel oil tied to the base of the tree as a barrier can successfully block the climbing.
4. Let ducks feed on snails. Put 3 to 5 ducks in each greenhouse, and the effectiveness is 95%.
5. Lime control. In the evening on a sunny day, lime was sprinkled under the tree. The snails came out of the evening and died of contact with lime.
6. Chemical control. At the beginning of the peak stage, 2% of the extermination screw, 8% of the schaleidone granules, 10% of polyacetaldehyde (snail enemy), and worm granules were directly applied to the regular activities and killed. Destroy effect. In the event of heavy rain, the granules are easily dispersed into the soil, resulting in reduced efficacy, requiring repeated application.
7. With Wan Ling, Xiao Shu Ling 900 times liquid, eliminate evil spirits, copper sulfate 1000 times, 100 to 200 times salt, 1% rapeseed cake leach solution or ammonia water spray 700 times, but also have good results.
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