Small beetles are one of the common drill borer pests in the garden, its adults and larvae often moth the edge of the phloem and xylem of the branches, through the drill moth as a pest of phloem, some even damage the plant channeling tissue leading to tree weakness, seriously causing dead trees, is an important pest of garden plants.
[1] The pest of small silverfish
Mainly damaged weak trees, the south overwinters in the branches, and most of the adult insects in the north (Liaoning, Jilin, Shandong) move from the victims to the soil around the dead wood trunks to overwinter. The pit is short and there are wood chips left on the outside. Adult wintering insects in Liaoning and Shandong fly out of late March to mid-April to replenish nutrients on the new shoots, and then invade weak wood, wind fall wood, wind fold wood and so on. The larvae begin pupating from late May to mid-June. From May to July, adult insects appear, and then invade the new shoots to eat, the adults have the habit of turning the branches, and an adult worm can drill several new shoots. Wintering begins in early and mid-October.
[2] Control plan of small silverfish
1. Cultivation control
Strengthen the management of care, timely and reasonable pruning, thinning, improve the health situation in the park, increase the application of phosphorus and potassium fertilizer to enhance the tree potential, improve the insect resistance of the tree itself. The damaged wood is cut down, transported out of the park in time, and the pest is skinned to reduce the source of insects.
2. Staggered peak planting
Susceptible plants such as cypresses are planted after the silverfish lay their eggs.
3. Trap and kill adult insects
According to the occurrence characteristics of small beetles, bait trees can be set up before adult feathering or in early spring to lure adults to dive in, and the development of small beetles in the bait wood can be checked frequently and dealt with in time. For example, before the adult insects of cypress-skinned small beetles begin to invade the branches and dry, fresh cypress branches and cypress trees with a diameter of more than 2 cm are piled up outside the forest to trap the adult insects; Use bait wood made of weakened wood, inverted wood, dead standing wood, and wind folded wood to induce adult insects such as small beetles in longitudinal pits and small beetles in horizontal pits to lay eggs, and after the spawning is completed, peel or burn them in a concentrated manner.
4. Professional prevention and control
Root control: before the occurrence of pests or in the early stages, dig a circular ditch 10-15 cm deep around the tree, use Qilin to eradicate moths, according to the diameter of the tree chest (cm): dosage (g): water consumption (kg) = 1:1:2 dilution, stir and dissolve after evenly pouring in the ring pit, wait for the water to dry after the soil can be covered, the effective period is up to 6 months;
Instillation control: Before the occurrence of pests or in their juvenile stages, drill holes at the base of the trunk or near the fresh excrement hollow (4.5 points drill depth to reach one-third of the xylem), and then use Ki Lin Moth Clearing, unscrew the bottle cap, remove the aluminum foil sealing film, and then cut off the top of the donated cannula and then screw it directly into the bottle to insert the drill hole for instillation. For larger trees, several holes can be drilled at a uniform angle on the trunk for instillation.
