A reader from Xingguo County, Jiangxi Province, Wang Peilan, wrote in asking: I have grown over 100 potted crab claws, and I noticed many white spots on the flattened leafy stalks. The scion part of the plant has almost completely died, and even the rootstock cactus or triangular arrow has also died. Is this a pest or a disease? And how can I prevent it? From the samples you sent by mail, we can confirm that it's not a disease but rather a pest—specifically, damage caused by scale insects. Both white shields and corn wax are present on the plants. These pests have a thick waxy coating on their bodies, making it difficult for insecticides to penetrate and kill them effectively. As a result, they are quite hard to eliminate once established. To prevent further infestation, here are some practical steps you can take: First, when purchasing plants like crab claws or fairy fingers, make sure to thoroughly inspect both the scions and the rootstocks (such as cacti or triangular arrows) for any signs of scale insects. If you find any, remove them immediately to prevent the infestation from spreading to other plants. Second, avoid placing your cactus or related plants near infected ones. Keep them separate to stop the pests from moving and attaching themselves to healthy plants. Third, ensure good air circulation and proper sunlight exposure. A well-ventilated and bright environment makes it harder for scale insects to thrive and attack your plants. Fourth, if you spot only a few pests, you can gently brush them off with a soft brush or scrape them off using a bamboo stick and rinse the area with clean water. You can also use transparent tape to stick and remove live insects. For larger infestations, you can spray the plants with a solution of 50% malathion EC diluted 1000 times, or 25% DBP WP diluted 2000 times, or 40% emulsifiable concentrate diluted 1000 times. Make sure to spray both sides of the plant evenly for best results. By taking these preventive measures early, you can significantly reduce the risk of future infestations and keep your plants healthy and thriving. North Pacific Squid Ring,Seafood Squid Ring Frozen,Frozen Food Squid Ring Zhoushan Xifeng aquatic co lid. , https://www.xifengaquatic.com
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