Toxicity of three modern insecticides (chlorantraniliprole, thiamethoxam and spinetoram) was examined against the first instar larvae of Pectinophora gossypiella (Saunders). The field rate and other two concentrations were used. The results showed that thiamethoxam was the most effective insecticide followed by chlorantraniliprole and spinetoram. The LC50,s were 8.9, 13.9 and 19 ppm for thiamet...

The objective of this work was the identification and differentiation of Trichogramma exiguum Pinto and Platner species, T. pretiosum Riley, and T. galloi Zucchi using sequences of the ITS2 region of ribosomal DNA. After extracting DNA from the studied species, a PCR reaction was performed, where the amplified samples were subjected to sequencing. The sequences obtained were submitted to a simi...

We describe seasonal patterns of parasitism by Telenomus coloradensis Crawford, Telenomus droozi Muesebeck, Telenomus flavotibiae Pelletier (Hymenoptera: Scelionidae), and Trichogramma spp. (Hymenoptera: Trichogrammatidae), egg parasitoids of the hemlock looper, Lambdina fiscellaria (Guenée) (Lepidoptera: Geometridae), after a 3-yr survey of defoliated stands in the lower St. Lawrence region (...

wolbachia is an intracellular endosymbiont, which can induce thelytokous parthenogenesis in trichogramma egg parasitoids with the infected females producing daughters without any mating. with regard to the usual transfer of wolbachia which is vertical from the mother to her offspring through the cytoplasm of eggs, this manipulation of host’s reproduction can enhance its transmission to future g...

Trichogramma species (Hymenoptera: Trichogrammatidae) are haplo-diploid egg parasitoids that are frequently used as biological control agents against lepidopteran pests. These wasps display two reproductive modes, including arrhenotoky (bisexuality) and thelytoky (unisexuality). Thelytokous forms are often associated with the presence of endosymbiotic Wolbachia bacteria. The use of thelytokous ...

The egg parasitoid, Trichogramma (Hymenoptera: Trichogrammatidae), is used extensively around the world as a biological control agent for the control of lepidopterous pests. Wasps are either released to augment an existing population “inoculative release,” or they are released in large numbers to coincide with maximum pest pressure “inundative release.” Field releases however, have had variable...

learning ability and memory duration are two inseparable factors which can increase theefficiency of a living organism during its lifetime. trichgramma brassice bezdenko (hym.:trichogrammatidae) is a biological control agent widely used against different pest species.this research was conducted to study the olfactory associative learning ability and memoryduration of t. brassicae under laborato...

Virgin females of the parasitoid wasp Trichogramma turkestanica produce minute amounts of a sex pheromone, the identity of which has not been fully established. The enantioselective synthesis of a putative component of this pheromone, (6S,8S,10S)-4,6,8,10-tetramethyltrideca-2E,4E-dien-1-ol (2), is reported as a contribution to this identification. Catalytic asymmetric conjugate addition of meth...