Aphid parasitoids are common in Brazilian wheat fields, and parasitize aphids at the wheat tillering stage. However, there is little information available about when this natural enemy occurs in wheat crops. This study investigated the initial occurrence of aphid parasitoids in four commercial wheat crops in northern Paraná during the 2009 crop season. We installed two Malaise traps at each whe...

A critical stage in the success of a parasitoid is the ability to locate a host within its habitat. It is hypothesized that a series of olfactory cues may be involved in altering the parasitoid's movement patterns at this stage of foraging. This paper focuses specifically on host habitat location and host location and the olfactory stimuli necessary to mediate the transition between these stage...

An experiment was conducted to test whether parasitoid resistance within a single clonal line of pea aphid (Acyrthosiphon pisum) might increase after exposure to the parasitoid wasp Aphidius ervi. Any change in resistance was expected to occur through an increase in the density of protective symbiotic bacteria rather than genetic change within the aphid or the bacterial symbiont. Six aphid line...

The presence of main phytophagous insects and their natural enemies has been recorded in quinoa crop (Chenopodium quinoa) as well the percentage infestation parasitism La Molina, from June 21st through September 27th, 2014. Survey was performed using pitfall traps, plant organ evaluation, aerial net, mined leaves collection mid third plant. Five important species were recorded, Liriomyza huidob...

The extinct members of the Psallopinae are important for classifying and understanding the relationships among the closely related mirid groups Isometopinae, Psallopinae (sensu Schuh, 1976) and Cylapinae. These subfamilies are considered to be the most primitive sister groups among mirids and their taxonomical composition, geographical distribution and life history are still poorly known. Extan...

Importation biological control can create new host-natural enemy responses that are different from those behaviours elicited in native ranges of the agent, and/or pest. This possibility was investigated with Argentine stem weevil (Listronotus bonariensis) presence three endoparasitoid species levels affinity to New Zealand pasture. The question posed whether exhibits species-specific or generic...