How to remove the Parthenocissus
As a common vertical greening plant, Parthenocissus are widely popular due to their strong climbing ability. But when its excessive growth threatens building safety, how to scientifically eliminate it becomes a problem. Based on actual maintenance experience, this paper will systematically analyze the two mainstream removal methods and reveal their winter growth characteristics. 1. Practical Guidelines for Removing Parthenocissus 1.1 Drug Elimination Method Select systemic herbicides such as glufosinate ammonium or cyclozinone, diluted at a ratio of 1:50 and loaded into a sprayer. Select fine weather for three consecutive days, spray evenly from the base of the plant upward, focusing on treating the main stem and aerial root-dense areas. Wilting of branches and leaves can be seen 7-10 days after application. At this time, dead branches need to be cleaned up in time to avoid secondary pollution. 1.2 Physical removal techniques use high branch shears to cut off the main stem 30cm from the ground. After 2 weeks of nutrient blocking, peel off layer by layer from the top. Pay attention to wearing protective gloves and use S-shaped pulling method to improve removal efficiency. For residual suction cups, you can use a wire brush dipped in citric acid solution to wipe them off to avoid damaging the wall. 2. Decoding of winter growth characteristics 2.1 Analysis of deciduous mechanism As a typical deciduous vine, when the temperature continues to fall below 10℃, the leaves initiate the formation mechanism of layer separation. After chlorophyll decomposes, anthocyanins appear, forming a red leaf landscape. After completely falling leaves, the lignified stems still have cold resistance at-25℃, and dormant buds can germinate again in the following spring. 2.2 Regional differences are reflected in the area south of the Qinling Mountains and Huaihe River. Winter temperatures are often higher than 0 ° C, and semi-deciduous leaves may occur. In the cold areas of the north, except for the main trunk, most lateral branches will naturally fall off. Under special circumstances, radiant heat from the exterior walls of the building may keep the plants locally evergreen.
Mastering scientific removal methods and growth rules can not only effectively control the expansion of Parthenocissus, but also rationally utilize its ecological value. It is recommended to choose a removal plan according to the building materials. Physical methods should be used for brick-concrete walls, and concrete structures can be treated with chemicals. Regular pruning and maintenance can allow this "vertical green carpet" to continue to add color to the city.