Control techniques of diseases and insect pests of Ligustrum lucidum

Ligustrum lucidum (Hawati Ligustrum lucidum), as a hot-selling variety of color block seedlings for landscaping in recent years, will occupy an important position in the near future engineering color block seedling market. Ligustrum chinense is an evergreen small tree belonging to Ligustrum genus of Oleaceae. It has the common characteristics of Ligustrum lucidum. It likes warm weather. It grows very fast in slightly acidic soil and needs a large amount of fertilizer during its growth period. However, it grows poorly in sandy soil with poor fertility. Ligustrum lucidum is native to Japan, so it is more cold-resistant. The lower the temperature, the brighter the golden color of the new leaves. At the same time, it has strong heat resistance, and the high temperature above 35 ℃ will not affect its ecological characteristics and ornamental characteristics. The golden leaf period is dominated by spring, autumn and winter, which is the mainstream of gold in the future.

pest control

Different regions of Ligustrum lucidum show different diseases and insect pests. The local main diseases are most serious, especially in the areas with more pear trees and cypress trees around the nursery. Due to more infectious sources, it is easy to occur in large areas, which must be paid enough attention to. Reasonable density is an effective measure to prevent disease, generally the density of each mu should not exceed 40,000 pots, too high density often causes disease outbreak. Rust occurs most seriously in June to September, and attention should be paid to the key control from May to June, which can be used in rotation with triclosone, Shigao, chlorothalonil and DuPont Fuxing, etc., every 10 to 15 days for 1 time, 3 to 5 times for control. 0.2% water-soluble fertilizer or trace element fertilizer can be added to control, topdressing and trace element supplementation can be carried out to enhance the disease resistance of plants. Root-eating pests such as white grubs and cutworms are the most serious, and the occurrence period is about 7 - 9 months. The control method is to remove weeds around and in the basin in time. For the seriously damaged areas, use 800 times phoxim to irrigate the roots. Pay attention to avoiding high temperature period and maintaining humidity in the basin when irrigating the roots to prevent phytotoxicity.