Boll weevils in dry bolls:is there a performance disadvantage?  

作　　者：COELHO Beatriz S. LEITE Suzany A. SANTOS Mateus P.dos MATES Eloito C.de MORAES Beatriz M.L.de BASTOS Cristina S. GUEDES Raul N.C. MOREIRA Aldenise A. CASTELLANI Maria A. 

机构地区：[1]Departamento de Fitotecnia e Zootecnia,Universidade Estadual do Sudoeste da Bahia,Vitória da Conquista,BA 45031‑900,Brazil [2]Faculdade de Agronomia e Veterinária,Universidade de Brasília,Brasília,DF 70910‑900,Brazil [3]Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa,MG 36570‑900,Brazil [4]Pós‑GraduaCão em Agronomia(Fitotecnia),Universidade Estadual do Sudoeste da Bahia,Vitória da Conquista,BA 45031‑900,Brazil

出　　处：《Journal of Cotton Research》2024年第3期243-252,共10页棉花研究（英文）

基　　金：supported by Fundacao de Amparoà Pesquisa do Estado da Bahia;the Coordenacao de Aperfeicoamento de Pessoal de Nível Superior Foundation(Finance Code 001)for financial support;Bahia Association of Cotton Producers。

摘　　要：Background Anthonomus grandis grandis is the main cotton pest in the Americas,with the potential to become a pest in other continents.The insect uses the plant's reproductive organs for feeding,oviposition,and survival strategies in the off-season,sheltering in dry bolls.This study aimed to know the reproductive potential,feeding,longevity,and morphometric characteristics of boll weevils from dry bolls,squares,and traps.Adults were obtained from infested squares,dry bolls,and traps installed in cotton fields and the Caatinga area.Thirty weevil pairs were maintained in the laboratory to assess the oviposition,feeding holes,longevity,and morphometric measurements of the parental and F_(1) generations.Results In the parental generation,boll weevils from traps(the Caatinga area and cotton cultivation)showed greater reproductive potential.Boll weevils from squares and the Caatinga area showed greater feeding activity compared with those from cotton cultivation.Greater rostrum length,thorax+abdomen length,and abdomen width were observed in boll weevils from cotton cultivation and dry bolls.The origin of boll weevils parental generation did not affect progeny emergence time.The F_(1) generation of boll weevils showed significant differences in average longevity depending on the origin of different microhabitats.Furthermore,differences in rostrum lengths were observed,with the boll weevils coming from traps installed in cotton cultivation,the Caatinga area,and dry bolls being the largest.Regarding thorax+abdomen length and abdomen width,the highest values were observed in those from the Caatinga area and cotton cultivation.Conclusion It was proven that dry bolls did not affect the reproductive,feeding,and longevity performance of boll weevils,enabling better insect fitness(reproduction and size)in relation to those coming from squares.The use of dry bolls as off-season shelter is an important survival strategy for the boll weevil.

关 键 词：Anthonomus grandis grandis Gossypium hirsutum OFF-SEASON SURVIVAL 

分 类 号：S435.622[农业科学—农业昆虫与害虫防治]