What are the methods for controlling cabbage aphids?
Cabbage is a vegetable we eat often. There was a news report earlier saying that cabbage had excessive toxin levels, which caused cabbage sales to plummet, and many people did not dare to buy cabbage during that period. The main reason was that field management during the cabbage growing period was not handled properly, and then large amounts of pesticides were used to prevent insects and diseases. Aphids are the most harmful to cabbage, running through the entire growing period. So today what we want to understand is how to treat cabbage aphids. Let's take a look together.
1. Seedling stage
Aphids also appear relatively often during the seedling stage of cabbage. At this time, aphids mainly affect the survival rate of cabbage and the growth of cabbage, because at this stage cabbage is still relatively small and in a rather fragile period. Aphids mainly gnaw on small leaves and the cabbage heart, leaving only the white small stems of the cabbage, and they do not even spare the small stems. So at this stage, if we are planting on a small area, we can kill the aphids by manual means, while for large-area planting, we can use yellow sticky boards to trap and kill them as well as chemical control.
2. Rosette stage
The rosette stage is also the time when cabbage grows most vigorously. During this period, the growing leaves of the cabbage determine the weight of the cabbage, and the main pest at this time is still aphids, and the number that breaks out is greater than at the seedling stage, so the harm to cabbage is also greater. If it is not controlled in time, it will trigger the appearance of other diseases, so the impact on cabbage is not just the harm of aphids. In severe cases, it may even cause the whole cabbage to rot or wither and die. We can reduce the occurrence of pests by clearing weeds in the field. At the same time, we can also enhance the resistance of cabbage by loosening the soil and applying fertilizer. We can also spread lime in the field to kill insects. Of course, we can also use agents that are non-toxic to cabbage itself or soap for spraying control.
3. Head-forming stage
The head-forming stage of cabbage is also the most important period of cabbage growth. It determines the quality and yield of cabbage, and this period is also the period when aphids appear the most. At this time, aphids have a great impact on the quality of cabbage. At the same time, at this stage we can no longer use chemical agents for control, because it will have a great impact on the quality of cabbage. Even low-toxicity or non-toxic agents will not do. So how do we remove the insects? First, we need to promptly clean out the withered leaves of cabbage in the field and not let them rot, otherwise they will attract other pests. Second, we can use trapping methods in time. Then we can use mesh netting to control pests. If there are really too many aphids, we can use fumigation in an appropriate amount for control or use a small amount of phosphorus-free laundry detergent for control.
The above are some simple methods that the editor wants to share with you today about how to control cabbage aphids. Here there is one more thing to remind everyone: whether at the seedling stage, rosette stage or head-forming stage, within half a month before harvest, no chemical agents used for pest and disease control can be sprayed, because otherwise the cabbage will still carry some toxins, and then poisoning would be bad. If everyone still wants to learn more agricultural knowledge, remember to follow us.