22 research outputs found
Validação das equações do NRC (2001) para predição do valor energético de alimentos nas condições brasileiras
Resíduos vegetais na superfície e carbono orgânico do solo e suas relações com a densidade máxima obtida no ensaio proctor
Soil water dynamics related to the degree of compaction of two brazilian oxisols under no-tillage
Aplicação de resíduo de reciclagem de papel em Cambissolo Háplico e seu efeito no solo e no cultivo de plantas
Efeito de semeadora com haste sulcadora para ação profunda em solo manejado com plantio direto
Cyclodextrins and ternary complexes: technology to improve solubility of poorly soluble drugs
Associative learning in immature lacewings (<i>Ceraeochrysa cubana</i>)
It is known that many social insects and arthropod predators and parasitoids can learn the association between a resource and volatile cues. Although there are various studies on the effect of experience in immature arthropods on behavior later in adult life, not much is known about the effects of such experiences on immature behavior. This was investigated here in the lacewing Ceraeochrysa cubana (Hagen) (Neuroptera: Chrysopidae). Whereas adults of this lacewing feed on plant‐provided food and honeydew, larvae are voracious polyphagous predators of several insect pests, and therefore important for biological control. Hence, studying the foraging behavior and the effects of learning in immatures of this species is important. We exposed immatures to the volatile methyl salicylate (MeSA), which was either associated with food or with the absence of food. Subsequently, their response to this volatile was tested in an olfactometer. Immatures that had experienced the association of MeSA with food were attracted to it and immatures that were exposed to MeSA during food deprivation were repelled. Subsequently, predator immatures that had experienced the association between MeSA and food were released on a plant without food and were found to use this volatile in locating patches with food. In contrast, larvae without such experience were found equally on food patches with and without the volatile. We conclude that these immature predators are capable of learning the association between volatiles and food, or the absence of food, and use this during foraging