Whitefly, aphids and thrips attack on cabbage

Pesquisa Agropecuária Brasileira

Germano Leão Demolin Leite²  Marcelo Picanço¹  Gulab Newandram Jham¹  Márcio Dionízio Moreira¹ 

[1] ,Universidade Federal de Minas Gerais Núcleo de Ciências Agrárias Dep. de AgropecuáriaMontes Claros MG

关键词: Bemisia tabaci;    Brevicoryne brassicae;    Thrips tabaci;    Brassica oleracea;    temperature;    nonacosane;    Bemisia tabaci;    Brevicoryne brassicae;    Thrips tabaci;    Brassica oleracea;    temperatura;    nonacosano;   

DOI  :  10.1590/S0100-204X2006001000003

来源: SciELO

【 摘 要 】

The objective of this work was to investigate the relationships between predators and parasitoids, leaf chemical composition, levels of leaf nitrogen and potassium, total rainfall, relative humidity, daylight and median temperature on the intensity of whitefly, aphid, and thrips attack on cabbage. Whitefly, aphids and thrips population tended to proliferate in the final stage of plant or reached a peak population about 40 days after plantation. The whitefly and thrips tended to increase with an increase in the median temperature. A dependence of Cheiracanthium inclusum and Adialytus spp. populations on whitefly and aphids populations, respectively, was observed. No significant effect was detected between K and nonacosane leaf content and aphid population. However, an increase in leaf N content was followed by a decrease of this insect population. No significant relation was observed between leaf N, K and nonacosane and whitefly and thrips populations. Highest nonacosane levels were observed in plants 40 days after transplant, and relative humidity correlated negatively with nonacosane. Natural enemies, especially the parasitoid Adialytus spp. and the spiders can be useful controlling agents of the whitefly and aphids in cabbage. Median temperature can increase whitefly and thrips populations.

【 授权许可】

CC BY   
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