title: [Population growth, distribution pattern and sampling technique of Thrips palmi on eggplant].
abstract: Population growth of Thrips palmi Karny on eggplant (Solanum melongena L.) were analyzed by mathematical models. The rate of population increase (r) of the adults and immature (instars 1-2) T. palmi were estimated to be 0.0630 and 0.0801 respectively in the open fields, and 0.0983 and 0.1036 respectively in the greenhouse. K value of logistic curve of T. palmi was estimated to be 33.90 in the greenhouse, and 23.50 in the open fields. The relationship between mean crowding (M*) and mean density (M) of T. palmi per eggplant leaf were estimated by Iwao's M*-M regression. The regression equation of adult and immature T. palmi on eggplant were: M* = 0.6011 + 1.468M and M* = 7.2515 + 2.064M respectively. The regression equation of the number of adult and immature was M* = 7.5138 + 1.9119M. When the population density of the adults and immature T. palmi per eggplant leaf were 10 to 100, the number of sampling should be 78 to 44.
authors.affiliation: Institute of Plant Protection, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021.
authors.forename: X
authors.initials: X
authors.lastname: Gu
authors.forename: Y
authors.initials: Y
authors.lastname: Bei
authors.forename: C
authors.initials: C
authors.lastname: Gao
authors.forename: H
authors.initials: H
authors.lastname: Chen
mesh_terms: D000818:Animals; D017753:Ecosystem; D007313:Insecta / Q000502:physiology*; D011158:Population Growth; D012494:Sampling Studies; D019657:Solanaceae / Q000502:physiology*