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What are the control methods for trunk-boring pests of cherry blossoms?

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The longhorn beetles that harm cherry blossoms usually include the star longhorn beetle, the glossy-shouldered star longhorn beetle, and the peach red-necked longhorn beetle. 1. The star longhorn beetle has 1 generation per year. When adults emerge from late May to early June, capture the adults: before the star longhorn beetle adult lays eggs, it first bites a notch about 2 mm deep and about 8 mm long in the bark in the shape of a "" or "", and then lays eggs inside it. During the peak egg-laying period in mid-to-late July, search for the notches on the trunk and destroy the eggs. During the stage when newly hatched larvae are active in the cortex, use a grafting knife to pick the larvae out. For larvae that have bored into the xylem, it is necessary to

The longhorn beetles that harm cherry blossoms usually include the star longhorn beetle, the glossy-shouldered star longhorn beetle, and the peach red-necked longhorn beetle

1. The star longhorn beetle has 1 generation per year. When adults emerge from late May to early June, capture the adults: before the star longhorn beetle adult lays eggs, it first bites a notch about 2 mm deep and about 8 mm long in the bark in the shape of a "eight" or "ding", and then lays eggs inside it. During the peak egg-laying period in mid-to-late July, search for the notches on the trunk and destroy the eggs. During the stage when newly hatched larvae are active in the cortex, use a grafting knife to pick the larvae out. For larvae that have bored into the xylem, a steel wire hook is needed to hook the larvae out; a grafting knife can also be used to first remove the frass and wood shavings cleanly, then a plastic oil spray can is used to inject 50% fenitrothion at a 1:50 dilution or Guo Shu Bao pouring liquid, and finally wet mud is used to seal the bore hole tightly.

2. The glossy-shouldered star longhorn beetle has 1 generation per year. For control, manual capture and chemical control are used, with the same methods as for the star longhorn beetle.

3. The peach red-necked longhorn beetle has 1 generation every 2 years. The peach red-necked longhorn beetle often mates and lays eggs from the crown to the base of the trunk on sunny days from 12:00 to 13:00, and adults can be captured after they appear in mid-June. The bore dust and excrement of the peach red-necked longhorn beetle are reddish-brown. When very fine reddish-brown frass is found, use a small knife to slit open the cortex and kill the newly hatched larvae.

The coffee wood moth has 1 generation per year. Because the adults are phototactic, blacklight lamps can be used to trap and kill them during the emergence period. Branches damaged by boring that show a wilting appearance should be cut off promptly, and split open to kill the insects or burn them. They can also be killed by spraying 1000-times-diluted nicotine-matrine solution or 20% miezhu phosphite emulsion at 50 to 200 times dilution.

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