A review of species of the genus Neopsocopsis Badonnel, 1936 is presented. Four species are redescribed, viz. Neopsocopsis hirticornis (Reuter, 1893), Neopsocopsis quinquedentata (Li & Yang, 1988), Neopsocopsis profunda (Li, 1995), and Neopsocopsis flavida (Li, 1989), as well as the description of one new species, Neopsocopsis convexasp. n. Seven new synonymies are proposed as follows: Pentabla...

Cotton produces insecticidal terpenoids that are induced by tissue-feeding herbivores. Damage by Heliothis virescens caterpillars increases the terpenoid content, which reduces the abundance of aphids. This effect is not evident in Bt-transgenic cotton, which is resistant to H. virescens. We determined whether induction of terpenoids by caterpillars influences the host quality of Aphis gossypii...

Fish–parasite systems could be subject to two scenarios under climate change: (i) increased water temperature might enhance parasite metabolism, allowing the spread rapidly; (ii) parasitism decrease if optimal for growth and transmission is exceeded. Sea lice are parasitic copepods commonly found on marine fish in tropical regions, yet their biology remains poorly investigated. In this study, w...

Abstract The negative impact of pests on world agriculture is estimated at 1.4 trillion dollars, which 5% the global gross domestic product. In order to save crops lost due agricultural in world, it urgent importance develop effective and fundamentally based control measures against them. this research, main studied were Aphis craccovora Koch; gossypii Glow; Brevicoryne brassicae, Lysiphlebus f...

Based on morphological and molecular data we investigated the species boundaries in genus Ochraethes Chevrolat, 1860. The delimitation with cytochrome c oxidase subunit 1 (COI) supports some synonymies highlights existence of a high phenotypic plasticity species. following are considered as new junior synonyms: O. virescens (Chevrolat, 1860) syn. nov. brevicornis 1860), octomaculata Chemsak &am...

Mitochondrial 16s rDNAwas sequenced fromninedifferentpopulationsofAphelinidae and 10 of aphidiinae. Sequence divergences between populations within a species are low, ranging from 0 to 0.38%. Divergences among species within the same genus range from 0 to 8.71%. Aphelinus asychisWalker has a sequence divergence from the otherAphelinus spp. of 8.71%,which is evenhigher than the divergences among...

Defences against parasites are typically associated with costs to the host that contribute to the maintenance of variation in resistance. This also applies to the defence provided by the facultative bacterial endosymbiont Hamiltonella defensa, which protects its aphid hosts against parasitoid wasps while imposing life-history costs. To investigate the cost-benefit relationship within protected ...

Abstract An annotated checklist of 211 species belonging to 13 families scale insects (Hemiptera: Coccomorpha: Coccoidea) Egypt including their common names, host plants and additional remarks is provided based on literature records collections made by the senior author in Egypt. Four are new fauna Egypt, namely Adiscodiaspis ericicola (Marchal), Dynaspidiotus ephedrarum (Lindinger), Rhizaspidi...

Phylogenetic analyses, from polymerase chain reaction (PCR)-amplified 12S rRNA and 18S rRNA gene sequences from cochineal insects of the genus Dactylopius present in Mexico, showed that D. ceylonicus, D. confusus, and D. opuntiae are closely related. D. coccus constitutes a separate clade, and D. tomentosus is the most distantly related. Bacterial 16S rRNA sequences from all the Dactylopius sp...