Simple Management of National Orchid (3)

It is observed that red spiders and shell insects are the main pests that harm the national orchid at present. The red spider does the greatest harm to the new leaves and absorbs the juice from the leaves. Causing spots all over the leaves. For red spiders, it is not suitable to use a single drug, such as the mixture of dimethoate with internal inhalation and isocarbophos 800 times with contact and stomach toxicity, once every 10 days, twice in succession. Special acaricidal agents such as propargite and triclofenac can also be used. Scale insects are the most common pests in Chinese orchids, which feed on the sap of orchid plants, including nail and powder, which are mostly caused by poor ventilation. A medium-shaped flat round, can be all over the orchid leaf and orchid head, some orchid peddlers often mix beads, take the false spot caused by the nail medium as the real spot to sell. The powder is like white dust, and when it is serious, it forms a piece, which makes the orchid leaves wither quickly. Due to the emergence of drug resistance, general drugs have been ineffective against shell insects. At present, the most effective drug is rapid culling, which can ensure the safety of orchids with 500 times liquid twice a year (once during the growing period and once after winter). Insecticides should be sprayed in the sunny morning and washed with water the next morning. I once saved several orchid gardens by pushing and culling. I remember once visiting a friend to see the orchids he planted in the corridor of the arcade. No, it's okay. I was shocked when I looked at it. It turned out to be his more than 100 pots of orchids (there should be more than 1,000 orchid leaves), each of which is covered with scale insects from head to toe and bottom. I'm afraid that many orchid plants have even eaten the growing points on the false bulbs and will no longer sprout in the future. I said to the friend: "your family is not rich, orchids are bought with hard-earned money, why not manage them well?" Not to mention selling orchids for money, it would be better to exchange some varieties with other orchid friends. " Soon I sent him a bottle of quick kill, and after a few days, the previously dense scale insects fell off in pieces. Extracted from "Orchid Treasure Book" Feng Gangyi of Macao