Euonymus japonicus, belonging to Lepidoptera and Moth. The larvae endanger the young shoots of the host leaves with larvae and encroach on the leaves. In severe cases, bald sticks are formed, and even the entire piece is dead.
The Euonymus tabulaeformis occurs once a year in the Jining area and winterizes with eggs on the shoots of the host. Overwintering eggs hatch more in mid-March, late, leeward sunny place can be hatched early 5 to 7 days, generally reach the hatching peak around March 20, the same egg can be hatched in 2 to 3 days, then the positive value is large Ye Huangyang leaves out. From late April to early May, the mature larvae begin to scab and phlegm, mostly concentrated in the earth seams around the root surface around 5 cm or in the weed grass. .
The adult emergence time is approximately mid-October and generally reaches the peak of emergence at the end of October.
The following control methods can be taken:
1, artificial control due to overwintering eggs and more attached to the top of the fresh shoots in the year, so the green belt can be combined with pruning every year before the winter to prevent, cut off the ovum sticks, eliminate the eggs.
2. Control of Pharmacy Since the host of Euonymus cuniculus is mostly green plants, the use of highly toxic pesticides should be prohibited. In recent years, we have conducted trials and tests with highly effective and low toxicity pyrethroid pesticides. The results showed that at the beginning of larvae, from the end of March to the beginning of April each year, 5% of the enemy's milk was killed or 3,000 times of 5% kung fu oil was used. Spraying the center and peripheral shoots evenly, the control effect is about 98%; other pyrethroid pesticides such as 20% chlorbenzuron, 20% chlorate, etc. can also be applied, and good control effects can also be achieved. .
White Tea
Guava White Tea,White Tea Leaves,White Peach Tea,Silver Needle White Tea
Hunan Junshan Yinzhen Tea Industry Co.,Ltd , https://www.junshan-tea.com