Bonsai trees are miniature trees grown in planters or pots. Although they are hardy, they are susceptible to pest problems. Finding the right bug spray for a bonsai tree is difficult because the plants' leaves are highly sensitive to chemicals and can be easily damaged or killed by the wrong type of pesticides.
The main pests bonsai trees attract are aphids and spider mites. Aphids are small greenish insects that appear on the leaves of bonsai trees. Spider mites look like small red, black or green spiders and can be seen on the leaves, trunk and branches of a bonsai tree. Both aphids and spider mites do serious damage to the leaves of a bonsai tree, weakening the tree and making it susceptible to diseases.
Insecticidal soaps are generally milder than other chemical pesticides, making them safer for use on bonsai trees. Mix or dilute the soap with water, or use the product according to the directions on the package. Spray the soap on one leaf of the bonsai tree, and wait a day or two to see if it damages the plant before applying it to the whole tree. Spray the soap on the bonsai tree according to the directions.
The Why Bonsai website recommends using pesticide stakes that are pushed into the soil around the base of the tree, allowing the bonsai to take in the chemicals naturally and kill off the pests from the inside out; pesticide stakes are available through many gardening centres. The number of stakes depends on the size of the bonsai tree; follow all directions on the package to keep the bonsai tree healthy.
Some mild pesticide sprays are available for bonsai trees. Dilute the pesticide, or follow the directions on the package to avoid damaging the tree. As with insecticidal soaps, spray the pesticide on a single leaf and wait a day or two to determine whether or not the chemicals will damage the tree. Apply pesticides to the tree to help control the population of harmful insects that live on the bonsai tee and keep it healthy.
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