The Latest Causes of Pesticide Damage in Honey Pomelo and Remedial Measures

The oil cells on the peel of honey pomelo are relatively large. During the young fruit stage, the peel is smooth and the tissue is tender, making it highly susceptible to damage from irritating chemical pesticides, which can seriously affect growers' economic interests. So how should pesticide damage in honey pomelo be handled? Follow the editor to learn about it together.

1. Symptoms of pesticide damage

Pesticide damage mainly appears on leaves, flowers, and fruit. When leaves are damaged, spots of different shapes and colors and scorched yellow perforations appear, and the leaves become pale green, yellowed, scorched, deformed, and fall off. When pesticide damage occurs to flowers, it mainly happens during the bud stage and flowering stage, mainly due to improper use of hormones and excessively high pesticide concentration, causing flower organ drop, premature withering, and flowers that do not set fruit. When fruit is damaged, brown spots, yellow spots, small fruit, thick peel, and deformities appear on the fruit surface.

2. Types of pesticide damage

Types of pesticide damage can generally be divided into acute pesticide damage and chronic pesticide damage. Among them, acute pesticide damage generally shows symptoms a few hours after spraying, causing water-soaked spots, wilting, yellowing, loss of green color, and whitening on leaves. Chronic pesticide damage generally does not show symptoms immediately after spraying, or the symptoms are not obvious, but it affects growth and development, mainly manifesting as weakened photosynthesis, slow growth and development, and deformed fruit, causing serious declines in yield and quality.

3. Causes of pesticide damage

First, there is a problem with the pesticide itself. If you buy pesticides that are counterfeit, expired, contain hidden ingredients, have active ingredient content below standard, are mixed with harmful impurities, have problems with the three certificates, or have registration information that does not match the label, pesticide damage may occur after spraying. There is also incorrect timing of spraying, such as spraying during high temperatures, because high temperatures evaporate the spray liquid, causing the pesticide concentration to become too high, thus causing pesticide damage; in addition, after spraying, because humidity is high and the orchard is not ventilated, the spray liquid not only dries quickly but also causes pesticide damage. Mixing too many pesticides together and improper dilution can also easily cause pesticide damage, and using too large a dose when spraying can also cause pesticide damage.

4. Remedial measures

If pesticide damage is discovered relatively early, you can immediately spray water to rinse it off, which can dilute the pesticide on the leaves and reduce the pesticide content in the crop. Fruit that has suffered pesticide damage should be removed promptly for the sake of future yield and quality. You can also spray brassinolide at 2000 times + potassium-containing foliar fertilizer at 2000 times, spraying until it feels as if there is standing water, which can alleviate pesticide damage.

The above is an introduction to the causes of pesticide damage in honey pomelo and remedial measures. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.