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Insect disease: the main cause of pear rotten
Pears are typically harvested right after the autumnal equinox begins, but some orchards rush the process, leading to rotten pears falling to the ground. According to analysis, most of these rotting pears are caused by pests, especially worms.
First, pest control must not be overlooked. Pear trees usually bloom around the Qingming Festival, and harvesting takes place near the autumnal equinox. After flowering, proper management is crucial. This includes effective pollination and antifreeze measures—both are key to a successful harvest. While fruit bags can be used based on conditions, and watering and fertilizing should be done properly, pest control requires consistent effort. It cannot be neglected or delayed, as it directly affects fruit quality and yield.
Second, take every opportunity to address diseases. There are many types of pear diseases that affect roots, branches, leaves, and fruits. Root and branch diseases may cause tree death, but they can often be treated if caught early. However, once fruit rot sets in, it becomes more difficult to manage. If infected parts are not removed from the field, the bacteria will spread rapidly, worsening the problem. Diseased buds can also lead to leaf drop and poor fruit development, resulting in small, unmarketable pears. Once fruit disease occurs, it’s often too late to treat, as symptoms may appear only after the infection has already spread. When black spots appear, the field should be cleared immediately to reduce the source of infection. Pathogens from stalks can even survive in storage, so prevention is essential.
Third, focus on prevention. Managing pear diseases requires a comprehensive approach. Proper pruning, spacing, and organic fertilization help build strong, healthy trees with better resistance. Spraying bactericides on leaves, fruits, and branches is important, especially two days before bagging. At other times, using a mix of different pesticides in rotation helps prevent resistance. Consistent and thorough spraying is key, ensuring enough solution is applied and the water-to-pesticide ratio is correct.
Fourth, ensure complete eradication of pests. Insects on branches and buds are easier to detect and eliminate, but those on the fruit are the most destructive and hard to spot. Prevention is the best strategy. Once an infestation occurs, it’s not just a yield loss—it’s a total loss. Early-stage fruit borers can make pears inedible. A tiny hole from a borer can quickly lead to rot. The yellow fungus worm is particularly dangerous, as it attacks both pears and pods. Once whiteflies lay eggs on the fruit, the pears fall from the tree or rot in the pit, becoming unsellable. Therefore, monitoring for whiteflies and borers throughout the growing season is critical. Pesticides should be applied regularly, ideally every two weeks, mixing insecticides and foliar fertilizers. Each application must be thorough, with accurate water proportions. Since biological pesticides are used, there's no need to worry about residue. With proper bagging, the harvest looks promising.