Relação entre a lagarta-do-cartucho e seus agentes de controle biológico natural na produção de milho
Relação entre a lagarta-do-cartucho e seus agentes de controle biológico natural na produção de milho
复制标题
拉加塔-杜-卡图乔和米洛天然生物控制剂之间的关系
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
I. Cruz
中科院分区：
文献类型：
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作者：
M. Figueiredo;Angélica Maria Penteado Martins;I. Cruz
本工作的目的是量化玉米杂交种BRS 3123由于秋粘虫（草地贪夜蛾）的攻击，在没有或存在其天敌的损失。在植物紧急情况后15天，完成人工侵染（每平方米一个卵团）。幼虫通过使用适当的保护笼（在侵染后最初保护两天，直到16天的最大保护期）在植物上进食，而不受其天敌的干扰。通过从0（无损害的植物）到5（死亡植物）的视觉等级确定的由害虫引起的损害，在16、6、4和2天的害虫保护期内，平均分别为4.01、1.39、1.09和0.93。在不使用生防药剂的情况下，该虫的危害造成干物质生产损失47.27%，籽粒产量损失54.49%。结果表明，天敌在控制玉米秋粘虫发生中起着重要作用。
This work had the objective of quantifying the losses in the maize hybrid BRS 3123 due to the attack of fall armyworm (Spodoptera frugiperda), in the absence or presence of its natural enemies. Fifteen days after the plant emergency, an artificial infestation (one egg mass per square meter) was accomplished. The larvae fed on the plant, without the interference of its natural enemies, by using an appropriated protection cage (initial protection for two days after infestation, until a maximum protection period of 16 days). The damage caused by the pest, determined through a visual scale from 0 (plants without damage) to 5 (dead plants), was on average, 4.01, 1.39, 1.09 and 0.93 for the pest protection period of 16, 6, 4 and 2 days, respectively. In the absence of the biological control agents, the attack of the pest caused losses of 47.27% in the dry matter production and losses of 54.49% in grain yield. The results evidenced the importance of natural enemies in the suppression of fall armyworm in maize crop.