How to control pests and diseases in hot and humid days?

1. Strengthen the management of shade shed: If the shade shed is too light, you can add a layer of 2-needle net or reduce the edge net by about 10 cm, which will help to enhance the air circulation in the park, reduce the temperature in the park and reduce the harm caused by high temperature.

2. In case of continuous high temperature weather, first, reduce the concentration of drugs used for pest control; 2. When applying pesticide or fertilizing, try to avoid the high temperature period, and choose to do it in the period when the temperature in the garden is lower than 25℃, including watering in the field, and try to do it in the afternoon when the temperature is low. If sprinkler irrigation system is installed, you can choose to irrigate at night (note: choose clean and clear water source. If muddy irrigation water is used for irrigation, it is easy to induce physiological leaf blight.

3. Under the condition of high temperature and drought, the pests of Panax notoginseng often cause serious harm, especially thrips, which are difficult to observe with naked eyes and are the most important pests of Panax notoginseng. Therefore, it is necessary to check the number of thrips (method: put the palm of your hand under the leaves of Panax notoginseng and pat the vibrating leaves to check the number of thrips on a single plant). When the number of pests per plant reaches more than 5, chemical control should be taken immediately, and the roots should be sprayed with Aketai+Mei Jia Li Hong 1000 times solution, and the leaves should be alternately sprayed with pymetrozine, eluent and imidacloprid+Mei Jia Point 65440.

4. High temperature weather is also easy to induce some diseases of Panax notoginseng, among which bacterial diseases and viral diseases are more common. Among them, the bacterial diseases can be selected from the solution of alkenyl cymoxanil+Chunlei bromothalonil+Jiamei Point 1500 times, or the solution of triazole ether cymoxanil+Chunlei Zhongsheng+boscalid+Jiamei Point 1500 times; Viral diseases can be inactivated by ningnanmycin, moroxydine hydrochloride and atenolol. If the air is humid, 1500 times solution can be used to adjust the leaf microenvironment and promote plant recovery.