Are stink bugs harmful to humans?

Stink bugs are a very common insect in our daily life. They are also often called bed bugs. Stink bugs emit a strange and unpleasant smell. When they are disturbed, stink bugs will secrete a volatile sour stink bug smell from their bodies. Under normal circumstances, bed bugs will not bite people, so they will not cause any harm to the human body. There is no need to worry too much and there is no need to be afraid of stink bugs.

(1) There is a lot of rain. After entering spring, especially in April and May, the excessive rainfall causes the air humidity to increase, which provides favorable conditions for the hatching of overwintering eggs, greatly increasing their hatching rate.

(2) The insect population base is too large. Due to the severe outbreak of stink bugs in September, most cotton farmers failed to take effective measures to prevent and control the infestation, resulting in a large base number of insect eggs, which provided favorable conditions for the outbreak of stink bugs.

(3) Prevention and treatment are not timely. Since the occurrence of stink bugs was about 15 to 20 days earlier than in previous years, and cotton farmers did not take preventive measures in advance, the untimely prevention and control was also a reason why the damage caused by stink bugs was more serious.

(4) Confusion in medication. In the selection of pesticides for controlling stink bugs, cotton farmers have been accustomed to using conventional organophosphorus and pyrethroid pesticides such as high-chloride to control pests in cotton fields for many years, which has caused stink bugs to develop resistance and significantly reduced the control effect of organophosphorus and its combination agents.

(5) It is an insect-like animal that emits a very smelly gas.

(6) It is a kind of pest that likes to live in the wild and can be seen in spring, summer and autumn.

Although the long-citrus stink bug is very harmful to fruits, the number of occurrences is generally not large, so manual control should be the main approach. Pay attention to protecting natural enemies and use chemical control only when necessary.

(1) Artificial control:

Adults and nymphs often live on leaves or fruits outside the tree canopy in the morning and evening or in rainy weather. They can be caught and killed in the morning or evening when the dew has not dried and they are inactive. The eggs are mostly laid on the leaves in egg masses, which are very easy to find. During the egg-laying period of the adults from May to August, you can conduct in-depth inspections in the orange orchard and remove the egg masses in time. However, if a black ring is found under the egg cover, it means that the egg has been parasitized by a parasitic wasp and should be kept in the field for protection to allow it to reproduce naturally and increase the number of parasitic wasps in the orange orchard.

(2) Biological control: The natural enemies of the orange stink bug are numerous, including yellow macaque ants, parasitic wasps, mantises, spiders, etc., which should be protected and utilized.

(3) Chemical control:

If the insect population is too large and it is impossible to solve the problem entirely by manual control, you can use a 1000-fold diluted solution of 80% DDT emulsion or a 800-1000-fold diluted solution of 90% trichlorfon crystals for spraying. If some chlorpyrifos mixture is added to the dichlorvos solution, the control effect can be improved, and the control can be carried out during the first and second instar nymph stage, with better results.

Natural enemies: There are many kinds of yellow macaque ants, flat-bellied wasps, mantises, spiders, etc.

(1) The prevention and treatment period should be reasonable. In the early stages of a stink bug infestation, start pesticide control during the nymph stage of the stink bug as much as possible to avoid harm from adult migration.

(2) Choose the right pesticide. When choosing pesticides to control stink bugs, the highly toxic organophosphorus pesticides that are confusing on the market should be banned. Currently, the more effective pesticides for controlling stink bugs include Regenstil and 80% Regenstil water-dispersible granules produced by Bayer of Germany. Ruidan is used in conjunction with Ruidan Companion, with the dosage of 30 ml + 2 capsules per mu, and sprayed evenly on 30 kg of water. The effective period can be as long as about 25 days, and it can also control some small flying insects such as cotton bollworm eggs and aphids. The dosage of 80% rutabaga is 2 grams, and the effective period is 20 days. The effectiveness of both agents against stink bugs can reach over 95%.

(3) Select the period for prevention and treatment. Blind stink bugs begin to harm cotton from mid-to-late May, so spraying should begin around May 20, spraying Ruidan + companion once every 25 days, and spraying 3 to 4 times throughout the growing season, which can effectively prevent and control the damage caused by blind stink bugs.

(4) In view of the living habits of the blind stink bug, when spraying pesticides for prevention and control, it is necessary to spray evenly and completely to improve the prevention and control effect.

(5) Spray pesticides at two critical periods. The first period is when the overwintering adults resume activities in spring (around mid- to late March). The overwintering adults have poor drug resistance and the first spraying should be done before they lay eggs in large numbers. The second period is before the nymph reaches the third instar (mid- to late April in Guangzhou). ② Drug types: 10% high-efficiency trichlorfon 2000 times diluted, or 90% crystal trichlorfon 500-800 times diluted, or 80% dichlorvos emulsifiable concentrate 800-1000 times diluted.

2. It is best not to open the window.

Seize two key periods for spraying. The first is when the overwintering adults resume activities in spring (mid-to-late March). The first spraying is done when the overwintering adults have poor drug resistance and have not yet laid eggs in large numbers. Second, before the nymphs reach the third instar (in mid-to-late April), the drug resistance of overwintering adults drops to the lowest point, and the newly hatched nymphs are sprayed for the second time when they are below the third instar and have poor drug resistance. Types of drugs: 2000 times diluted 10% high-efficiency trichlorfon, 500-800 times diluted 90% crystalline trichlorfon, or 800-1000 times diluted 80% dichlorvos emulsifiable concentrate. 2. It is best not to open the window or open another window.