Investigation and Control Research and Evaluation of Willow Catkins in Daxing District
In order to obtain basic data on willow catkins in Daxing District and provide data support for catkin management,multiple prevention and control measures are proposed to jointly carry out prevention and practical verification,and evaluate the effectiveness of prevention and control;the effect of pore spacing on the inhibition effect of drug injection drilling to suppress catkins is analyzed.A survey and statistics on the distribution of wil-low trees in Daxing District,as well as the time and location of willow catkins is conducted;Using experimental verification methods,samples with different injection hole spacing values were set up to statistically analyze and compare the quantity and quality of catkins in new and old willow branches,in order to determine the inhibitory effect;various survey methods are used such as visits,telephone follow-up,and community WeChat groups to vis-ually evaluate the prevention and treatment effects of gossip.The results show that female poplar trees with a length of 20～40 cm in Daxing District account for as much as 79.8％of the stock of female poplar trees,which is the main source of catkins;From early to mid-April,it is the peak period for the flying catkins of Populus to-mentosa and Populus davidiana;The peak of willow catkins is from late April to early May;In mid to late May,there is a peak of fast-growing poplar catkins such as 107 poplar,108 poplar,and Zhonglin-46 poplar.Yihua No.1 has a significant inhibitory effect on flower catkins,and no new flower catkins were found in the branches;The quantity and quality of the elderly's catkins decreased,with a decrease of 91.67％and 90％in Group A and Group B,respectively,and a decrease of 44.78％and 43.3％in catkins quality.Comparing the effects of 20cm hole spac-ing and 40cm hole spacing on the suppression of catkins,the two have a relatively small impact,with only 3.05％impact on the quality of catkins.About 55％of the population surveyed were only relatively satisfied with the ef-fectiveness of controlling behind the scenes.Shortening the hole spacing can be done appropriately without affect-ing the growth and recovery of willows;Further exploration is needed for the control of willow catkins in Daxing District.Based on statistical data,scientific suppression methods should be adopted while strengthening publicity and guidance.
Daxing Districtinvestigation of willow flying catkinscatkin controleffect evaluation
万方数据
维普
