Investigation on the species and harm of pests on Amygdalus pedunculatus in the sandy area of northern Shaanxi Province of northwestern China

  Objective  Amygdalus pedunculatus is an important ecological and economic tree species in the sandy area of northern Shaanxi Province of northwestern China, which plays an important role in regional economy and ecological construction. In recent years, they have been disturbed by a variety of pests, and the damaged area is increasing and becoming more and more serious. In this study, the species and harm of pests on A. pedunculatus in the sandy area of northern Shaanxi Province were clarified, so as to provide basic data for the monitoring and scientific prevention and control of watermelon pests.

  Method  From March 2017 to October 2020, pests on A. pedunculatus were collected by manual collection and black light trap in the sandy area of Northern Shaanxi Province, and the collected pests specimen were identified, sorted and floristicly analyzed. Then, the damage degree of pests was systematically investigated by standard field investigation method.

  Result  There were 35 species of pests recorded belonging to 3 orders and 19 families in the sandy area of northern Shaanxi Province, among which, 15 species belong to Coleoptera, accounting for 42.86%; 11 species belong to Hemiptera, accounting for 31.43%; and 9 species belong to Lepidoptera, accounting for 25.71%. The faunas analysis showed that The Palaearctic species of Coleoptera pests on A. pedunculata were the most, accounting for 73.33%, and the widespread species of Lepidoptera and Hemiptera pests were the most, accounting for 88.89% and 81.82%, respectively. The analysis of pest damage degree showed that there were 5 kinds of serious pests, 8 kinds of moderate pests and 22 kinds of light pests on A. pedunculata.

  Conclusion  Coleoptera and Hemiptera are the main pests on A. pedunculata in the sandy area of northern Shaanxi Province. Among them, Coleoptera pests are mainly Palaearctic species, while Hemiptera and Lepidoptera pests are mainly widespread species. The main pests on A. pedunculata are Proagopertha lucidula, Diglossotrox alashanicus, Grapholitha funebrana and Myzus persicae.