title: [Geostatistical analysis on distribution dynamics of Myzus persicae (Sulzer) in flue-cured tobacco field].
abstract: Abstract: Myzus persicae belonging to Aphididae, Hemiptera, is an important migratory pest in tobacco field. As nymph and adult, it sucks the juice, breeds the mildew stains disease, spreads tobacco virus diseases and causes huge losses to the yield and quality. The distribution pattern and dynamics of winged and wingless aphids in the field were investigated from the transplanting of tobacco to the harvesting stage of mid-place tobacco leaves in Enshi, Hubei. The semivariable function characteristics were analyzed by geostatistical method, and the field migration pattern were simulated. The results showed that the population dynamics of winged aphids in Enshi were of bimodal curve, with two peaks at 3 weeks after transplanting and 2 weeks after multi-topping of tobacco leaves, and there were five-step process such as random, aggregation, random, aggregation and random. The population dynamics of wingless peach aphids were of single-peak curve, getting its peak before multi-topping, and had random, aggregation, random three-step process. Human factors and the hosts had considerable effects on the population density. Spatial distribution simulation-interpolation-figure could clearly reflect the dynamics of tobacco aphids. Combined with the Pearson correlation analysis, we found that the population density was low and highly concentrated as winged type in the immigration period, which was the key period for the management of peach aphids.
authors.forename: Peng-liang
authors.initials: PL
authors.lastname: Xia
authors.forename: Ying-hong
authors.initials: YH
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Fan
authors.forename: Jun
authors.initials: J
authors.lastname: Tan
mesh_terms: D000818:Animals; D001042:Aphids; D009758:Nymph; D018515:Plant Leaves; D011156:Population Density; D011157:Population Dynamics; D014026:Nicotiana