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Biological Characteristics and Control Methods of the Black-spotted Looper Moth on Black Locust

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Black-spotted looper moth on black locust. It belongs to the family Geometridae, order Lepidoptera, and is also known as the black locust looper. It is distributed in the black locust forest areas of the old course of the Yellow River in Anyang, Puyang, Xinxiang and Kaifeng cities of Henan Province, mainly damaging black locust (Robinia pseudoacacia), and in outbreak years it can also damage jujube trees and crops. This insect is voracious, and in a short time it can eat all the leaves of entire branches and entire trees. In hot and dry years, it can strip the leaves bare 2 to 3 times a year, causing the upper parts of the trees to die and new shoots to sprout from the middle and lower parts of the trunk, causing serious harm to tree growth. Control methods: (1) Establish

Black-spotted looper moth on black locust. It belongs to the family Geometridae, order Lepidoptera, and is also known as the black locust looper. It is distributed in the black locust forest areas of the old course of the Yellow River in Anyang, Puyang, Xinxiang and Kaifeng cities of Henan Province, mainly damaging black locust (Robinia pseudoacacia), and in outbreak years it can also damage jujube trees and crops. This insect is voracious, and in a short time it can eat all the leaves of entire branches and entire trees. In hot and dry years, it can strip the leaves bare 2 to 3 times a year, causing the upper parts of the trees to die and new shoots to sprout from the middle and lower parts of the trunk, causing serious harm to tree growth.

Control methods:

(1) Establish mixed forests. In recent years, the mixed forests of poplar and black locust in Anyang City have basically suffered no damage, while others have all been affected, so establishing mixed forests is the fundamental way to control the black-spotted looper moth on black locust

(2) Protect natural enemies and create a favorable ecological environment. Building bird nests, protecting and attracting natural enemy insects, and introducing insect viruses are all economical and effective control methods that can achieve twice the result with half the effort:

(3) Physical control. Dig pupae manually; during the adult stage, use black light lamps or bonfires to concentrate and trap adult moths.

(4) Control the source of infestation. The occurrence of the black-spotted looper moth on black locust has an obvious source of infestation, and methods such as smoke agents can be used to promptly control the source of infestation.

(5) Chemical control. Applying diflubenzuron before the pests reach the 3rd instar can achieve ideal results, and aerial ultra-low-volume spraying at 150k~lm2 is sufficient. This pesticide has good adhesion, resists rain erosion, and provides good protection for natural enemy insects. It not only affects one generation of the black-spotted looper moth on black locust, but can also cause poor development of the next generation of larvae, pupae and adults, resulting in deformities and failure to reproduce normally.

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