The influence of weather and microclimate onDalbulus maidis(Homoptera: Cicadellidae) flight activity and the incidence of diseases within maize and bean monocultures and bicultures in tropical America
作者:
VILMA CASTRO,
CARMEN RIVERA,
SCOTT A. ISARD,
RODRIGO GÁMEZ,
JACQUELINE FLETCHER,
MICHAEL E. IRWIN,
期刊:
Annals of Applied Biology
(WILEY Available online 1992)
卷期:
Volume 121,
issue 3
页码: 469-482
ISSN:0003-4746
年代: 1992
DOI:10.1111/j.1744-7348.1992.tb03457.x
出版商: Blackwell Publishing Ltd
关键词: Leafhopper;agroecology;movement;maize ray ado fino virus;corn stunt spiroplasma;maize bushy stunt mycoplasma
数据来源: WILEY
摘要:
SummaryMixed cropping systems in tropical America have been shown to be less prone than monocultures to damage from pathogens carried by insects. This finding formed the basis for a series of experiments conducted in Costa Rica to evaluate the hypothesis that mixed cropping systems create a physical environment that influences vector movement and consequently the spread of leafhopper‐borne pathogens.The principle finding of the study is that both the mixture of plants and planting density have little influence on the spread of pathogens byDalbulus maidis, an oligophagus leafhopper which prefers maize, within maize and bean single and mixed cropping systems. Leafhopper flight activity proved similar for high and low density monocultures and bicultures. The number of leafhoppers immigrating to and emigrating from a field appears dependent on the size of the field, not the density of maize plants. Single and mixed crops with the same density of maize plants were equally prone to damage by pathogens carried by leafhoppers. The lower percentage infection in high density than in low density maize treatments resulted from fewer vectors per plant in the forme
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