The sargus is a species of lepidopteran insect, belonging to the family of moth exterminators, commonly known as the persimmon moth or persimmon fruit moth. It is one of the primary pests that damage persimmon trees. The larvae, which feed on the fruits, are particularly destructive during their early stages of development. Infestation can lead to the persimmons shrinking, turning from green to brown, and remaining on the tree—this condition is often referred to as "small black persimmons." Below are some scientifically proven methods for controlling and preventing this pest:
In winter, it is recommended to scrape the pedicels (the small stems that connect the fruit to the branch). This involves peeling off the rough and old bark, removing any debris or frass (insect excrement) from the tree, and burning it in a concentrated area. This practice helps eliminate overwintering larvae effectively.
During mid-June, mid-August, and early September, it's important to remove infested fruits promptly. These should be collected and buried deeply to reduce the risk of second-generation larvae emerging later in the season.
Another effective method involves using straw traps. In mid-August, before pruning the trunk, place straw bundles on the main branches. This lures the larvae into the straw, where they can be collected and destroyed after winter. Burning the straw ensures that any remaining larvae are eliminated.
For chemical control, there are several options available. During the two generations of adult moths, spraying solutions such as 0.5–2.5% deltamethrin at a concentration of 5000–5 times diluted or 20% fast-killing D can significantly reduce infestations. Other alternatives include 50% malathion, 50% dichlorvos EC, 50% killer pine, or 40% dimethoate, all diluted to 1000 times. These treatments have shown good results in managing the pest population.
Additionally, for smaller persimmon trees, a herbal approach can be used. In early August, apply a liquid solution directly to the affected areas using a brush or cotton ball. This method can effectively target and eliminate the second generation of larvae without the need for broad-spectrum chemicals.
By combining these strategies, farmers and gardeners can achieve long-term and sustainable control of the persimmon fruit moth, ensuring healthier and more productive orchards.
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