Population dinamic of snap bean pests on four growing seasons and its influence on productive parameters

• Autor(a) principal: Menezes Junior, Ayres de O.
• Data de Publicação: 2003
• Outros Autores: Simões, Homero Christoval, Souza, Adriano Misael, Takada, Ronaldo Mitsuo
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/2189
• topic: Empoasca kraemeri; Bemisia tabaci; Diabrotica speciosa; Phaseolus vulgaris L.; Empoasca kraemeri; Bemisia tabaci; Diabrotica speciosa; Phaseolus vulgaris L.

Insect pests of snap beans in northern Paraná state – Brazil were monitored during four growing seasons: March – May, May – June, August – September, September – November. Adults of leafhopper (Empoasca kraemeri), whiteffly (Bemisia tabaci) and corn rootworm (Diabrotica speciosa) were monitored weekly using a cone trap. Leafhoppers nymphs were counted in mid height trifoliate leaves. The productive parameters evaluated in harvesting were: number of pods / plant; number of marketable pods; number of damaged pods divided in bent pods, empty pods or bored pods. Insect infestation were lower in August – September growing period, which yielded higher percent of marketable pods. The highest population of leafhopper occurred in March – May period, when the percent of curved pods were also the highest. Maximum population of whitefly occurred in early season of March – May growing period. Leaf beetle (D. speciosa) population did not surpass de damage threshold in any growing period, but was higher in March – May season.