The structural dynamics of host-parasitoid populations play a key role in the mechanism of natural community development with invasive species. Species invading new habitats experience coevolution with their newly acquired natural enemies, and their population dynamics are driven by a complex interaction between biological and environmental factors. We examined the biological and environmental ...

Three previously introduced parasitoids (Acerophagus papayae Noyes and Schauff, Anagyrus loecki Noyes and Menezes, and Pseudleptomastix mexicana Noyes and Schauff [Hymenoptera: Encyrtidae]) of the mealybug Paracoccus marginatus Williams and Granara de Willink (Hemiptera: Pseudococcidae) were studied for their host instar susceptibility and sex ratio, host instar selection, and interspecific co...

in the current study some information is presented about the distribution and associations between alfalfa aphids and their parasitoids in different regions in 11 provinces of iran, as well as an identification key to the parasitoids. the main aphids were therioaphis trifolii maculata (buckton) and acyrthosiphon pisum (harris) followed by aphis craccivora koch and acyrthosiphon kondoi shinji. t...

Gonatocerus ashmeadi Girault (Hymenoptera: Mymaridae), a parasitoid of Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae) (glassy-winged sharpshooter), was used as a model insect to investigate triple marking a minute hymenopteran for potential use for monitoring dispersal patterns of natural enemies in the field. The triple mark contained egg albumin in chicken eggs, casein in bovine m...

There is relatively little information available concerning the physiological and biochemical interactions between whiteflies and their parasitoids. In this report, we describe interactions between aphelinid parasitoids and their aleyrodid hosts that we have observed in four host-parasite systems: Bemisia tabaci/Encarsia formosa, Trialeurodes vaporariorum/E. formosa, B. tabaci/Eretmocerus mundu...

Oak galls are spectacular extended phenotypes of gallwasp genes in host oak tissues and have evolved complex morphologies that serve, in part, to exclude parasitoid natural enemies.Parasitoids and their insect herbivore hosts have coevolved to produce diverse communities comprising about a third of all animal species. The factors structuring these communities, however, remain poorly understood....

this paper reports the occurrence of the hymenoterous parasitoids of the beet moth, scrobipalpa ocellatella boyd larvae in iran for the first time. two braconid species of microchelonus subcontractus abdinbekova and bracon intercessor nees were collected from the larvae of s. ocellatella in the sugar beet fields located in ray, the southern district of tehran. these parasitoids are belonging to...

New distribution records and host associations of natural enemies banana insect mite pests are reported. These include eight parasitoids (two trichogrammatids, two mymarids, encyrtids, one pteromalid, scelionid) twelve predators (one thrips, staphylinids nine coccinellids). Two egg parasitoids, Prosoligosita perplexa Hayat & Husain Epoligosita duliniae Livingstone Yacoob reported for the fi...

Three major primary parasitoids of the diamondback moth, Plutella xylostella (L.), are found in the Cameron Highlands, Malaysia. Cotesia plutellae (Kurdjumov) was discovered in the early 1970s, Diadegma semiclausum (Hellén) and Diadromus collaris (Gravenhorst) were introduced in the mid 1970s from New Zealand and Australia. Field studies in the early 1980s showed that C. plutellae was the domin...