2016
DOI: 10.1590/1519-6984.06215
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Abstract: Among the natural enemies of insect pests in rice fields, parasitoids are especially notable. To better understand the space-time dynamics of these insects, the objectives of this study were to describe and compare groups of parasitoids in organic irrigated rice fields using two management approaches for levee vegetation, and to relate them to the phenological stages of rice cultivation (the seedling, vegetative, and reproductive stages). The samples were taken in a plantation located in Viamão, RS, Brazil. Th… Show more

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Cited by 3 publications
(4 citation statements)
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“…Pest insects and natural enemies were more abundant and rich in the Philippines in rice fields surrounded by vegetated levees than in rice fields without this feature (Marcos et al, 2001;Gurr et al, 2011). The importance of wild vegetation in rice levees has already been described in crops with organic system, increasing the presence of predators and also parasitoids (Acosta et al, 2017;Simões-Pires et al, 2016). Thus, there is an important advantage, as parasitoids in large monocultures need to forage over large distances, leading to high costs in terms of time and energy (Powell, 1986), affecting their distribution within the crop and consequently the distribution and population of pests (Baggen and Gurr, 1998).…”
Section: Discussionmentioning
confidence: 99%
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“…Pest insects and natural enemies were more abundant and rich in the Philippines in rice fields surrounded by vegetated levees than in rice fields without this feature (Marcos et al, 2001;Gurr et al, 2011). The importance of wild vegetation in rice levees has already been described in crops with organic system, increasing the presence of predators and also parasitoids (Acosta et al, 2017;Simões-Pires et al, 2016). Thus, there is an important advantage, as parasitoids in large monocultures need to forage over large distances, leading to high costs in terms of time and energy (Powell, 1986), affecting their distribution within the crop and consequently the distribution and population of pests (Baggen and Gurr, 1998).…”
Section: Discussionmentioning
confidence: 99%
“…Moreover, as in the O.M. there is wild levees vegetation, including the presence of flowering species that increase the richness of parasitoids (Simões-Pires et al, 2016). Therefore, the abundance may not be so dependent on the presence or proximity of the preserved area.…”
Section: Discussionmentioning
confidence: 99%
“…The role of levee vegetation in the diversity of parasitoids was also tested in rice fields, comparing area [78]. One of them the wild vegetation from the levees was cut (C) monthly since the beginning of the planting period until the harvest, and in the other, the wild vegetation was not cut (NC).…”
Section: The Increase Of Parasitoid Action Through Conservative Biolomentioning
confidence: 99%
“…Unfortunately, we do not have many examples of this kind of study in the American continent, but several countries in Europe have been studying the influence of flowers on survival, density, and pest control ability by parasitoids and predators. We can cite the work of [88], of the National Institute of Agricultural [78].…”
Section: The Increase Of Parasitoid Action Through Conservative Biolomentioning
confidence: 99%