Can laundry detergent be used to control flower pests?

Laundry detergent can control pests on most potted flowers. Spraying a 1000-fold laundry detergent solution once on the leaves of flowers can keep the flowers free from red spider mite damage for about half a month. For scale insects on perennial herbaceous and woody flowers, spraying a 1000-fold laundry detergent solution once every 3-4 days, for 2-3 consecutive times, also has a noticeable control effect. Pouring a 1000-fold laundry detergent solution around the roots of flowers can control nematode damage to flower tubers and bulbs.

However, long-term use of laundry detergent to kill insects will increase the alkalinity of the potting soil and affect the normal growth of flowers. Therefore, some acidic fertilizer must be applied as appropriate, and the soil should be loosened and replaced frequently to prevent the potting soil from becoming alkaline.