Garlic can treat scale insects, see here for the correct usage

Last year, I saw two seedlings with scale insects at a street stallLianban orchid, and took them home because they looked pleasing. After getting home, I observed them with a magnifying glass and found more clustered in the leaf sheaths and the crevices of the leaf stalks, so I decided not to scrape them off (first, because it was very difficult to scrape, and second, to observe the curative effect as a comparison), and directly used garlic to treat the scale insects. Method: Take four cloves of red-skinned garlic and mash them, divide into two portions. Portion A gets more water added (just enough to basically soak through the potting medium in the pot); portion B gets a little water added and is left to soak for a while, making it into a thick paste. Use a brush dipped in the B portion of garlic juice to coat the front and back of the leaves all over, then apply the remaining garlic paste externally to the crevices of the leaf stalks, and let the juice seep into the crevices; stir the A portion of garlic juice and pour it into the pot. With the above method, for the first three times, do it once every three days. For the second and third times, be careful to wipe off the dried garlic at the leaf stalks before applying again. Through comparative observation, after two treatments no new scale insects were found, and the adult scale insects growing on the leaf surface and leaf back fell off with a light touch. For the fourth and fifth times, do it once a week, focusing on applying the thick juice of portion B to the leaf sheaths and leaf stalks to consolidate the curative effect. Result: Up to now, no scale insects have been found, and a new shoot has already grown. 1. The insect spots on the old plant are still vivid. 2. The white on the leaf stalks is garlic residue that was not cleaned off. Last year's carelessness happened to come in handy for this year's photos. (Kong Linggang)