Ladybug, commonly known as Flower Sister, is now being trained by garden researchers in Harbin City to guard the urban garden and ecological balance. On the 20th, in the experimental field of the Municipal Institute of Garden Research, a thick plum was hung with a "beneficial insect egg card", yellow as the size of a small grain of more than 20 heterochromatic ladybird eggs, neatly arranged on it, within a week, these ladybird babies will hatch successfully, and eventually grow into heterochromatic ladybird adults, becoming natural enemies of pests such as aphids, so as to avoid tree branches and leaves being eaten by aphids. Compared with the use of drugs to kill insects, this biological prevention and control method is more green, environmentally friendly, and conducive to ecological balance.
Zhu Changlong, director of the Harbin Municipal Institute of Landscape Research, told reporters that the Municipal Garden Research Institute has observed and observed the heterochromatic ladybird in the past two years, and found that this ladybird can not only prey on aphids, but also prey on the eggs and larvae of elm purple leaf beetles and elm green hair glowworms, at the same time, heterochromatic ladybirds have the characteristics of strong adaptability, strong fecundity, large food intake and wide eating habits, and have good application prospects in biological control.
Ladybird pest control is not artificially raising small ladybirds and then releasing them to urban gardens, because ladybirds will eat a large number of insect pests such as aphids during growth, so it is better to put worm cards with ladybird eggs on insect-infested trees than to directly release ladybird adults. Liu Zhanguo, head of the laboratory of the Harbin Municipal Institute of Landscape Research, said that a heterochromatic ladybird can prey on hundreds of aphids a day.
At present, the technical staff of the Municipal Institute of Landscape Research is choosing a suitable location, hanging and releasing heterochromatic ladybird egg cards in batches, and the ladybird larvae will find prey for prey after hatching, and artificially help the ladybird to expand reproduction to achieve the purpose of preventing and controlling pests.
At present, the researchers in Harbin have basically understood the biological characteristics of heterochromatic ladybirds in Harbin and have initially mastered their feeding methods. In the next step, researchers will study how to reduce costs and promote heterochromatic ladybirds for biological control on a large scale.
Whether it is an aphid or elm purple leaf beetle or elm green hair firefly beetle is a garden pest that is more harmful to the vegetation of garden trees in Harbin City, and it is also a pest that is more difficult to control, although the drug control will be effective immediately, it will also kill the beneficial insects and make the pests resistant, and may also accidentally injure other beneficial insects. Biological control is a natural and effective control method, and it is also the development direction of plant protection advocated at home and abroad.
Source: Harbin News Network
Reporter: Huo Liangwen/Photo
Editor: Ma Yunpeng