Investigation on Coccoidea of Fruit Tree and Garden Plant of Yan'an and Chemical Control Effect of Test in the Field
LI Chun-xia;DANG Yun-ping;LI Hong-fei;LIU Dong-xiong;LIU Lai-xi;Yan'an Vocational and Technical College;
In order to select the new and effective drugs to effectively control the scale insect harm,the main Coccoidea species and harm were investigated in fruit tree and garden plant in urban and downtown of Yan'an from 2012 to 2017 year.Four kinds of chemical pesticides such as 40% methidathion-pirimiphos-ethyl·buprofezin EC 1 000×,25% buprofezin SC 500×,4% avermectin-acetamiprid EC 1 000×,40% acetamiprid-chlorpyrifos EC 800× were choosed and tested to control for the most severe of Pseudaulacaspis pentagona(Targioni Tozzetti),Didesmococcus koreanus Borchs and Eriococcus legerstroemiae Kuwana in the field.At the same time in order to find a better prevention and control technology,the chemical control measures were tested for three kinds of Coccoidea for more than a year.The results showed that there are 7 species of the main Coccoidea damage in fruit tree and garden plant,the main Coccoidea species and harm have been preliminary mastered.Investigation showed that four kinds of pesticide control efficiency for 93.76%,83.96%,79.92% and91.19% respectively after 7 days,the result of experiment conducted in the field indicated that four pesticides of preventing Coccoidea all have good effect,and that 40% methidathion-pirimiphos-ethyl·buprofezin EC1 000× and 40% acetamiprid-chlorpyrifos EC 800× were the best and worthy commended two pesticide to control the main Coccoidea.The test result of the annual chemical control measures,also has achieved significant effect.According to the results of the survey on July 1,2016,the population density of three kinds of Coccoidea species was significantly reduced,the largest reduction was Eriococcus lagerostroemiae Kuwana,the second was Didesmococcus koreanus Borchs,the third was Pseudaulacaspis pentagona(Targioni Tozzetti).According to the results of the survey on November 30,2016,the use of the brush in winter and early spring to brush and kill the insect body of the branches with dipped lime sulphur could greatly reduce the population density base and play agood role in the prevention and control of the latter.The survey showed that there was not any Eriococcus lagerostroemiae Kuwana in the crape myrtle tree,the survival rate of Didesmococcus koreanus Borchs in the Prunus persica tree was 0.66%,and survival rate of Pseudaulacaspis pentagona(Targioni Tozzetti)was 1.79%in the wild peach tree on May 15,2017.
【CateGory Index】： S436.8
【CateGory Index】： S436.8