00518nas a2200145   4500008004500000020001400045245007600059210006900135260001100204300001000215490000700225653002200232100002100254856009700275       2008                        Engldsh    a0970-903700aEffect of light on activity patterns of some night flying adult insects0 aEffect of light on activity patterns of some night flying adult   cAugust  a37-420 v2310aSitophilus oryzae1 aGovindarajan, D.  uhttps://weevil.myspecies.info/effect-light-activity-patterns-some-night-flying-adult-insects02386nas a2200169   4500008004500000020001400045245014700059210006900206260001200275300001400287490000700301520170300308653002202011100002302033700002502056856013502081       2008                        Engldsh    a0046-225X00aEffects of prior experience on host selection and host utilization by two populations of Anisopteromalus calandrae (Hymenoptera: Pteromalidae)0 aEffects of prior experience on host selection and host utilizati  cOctober  a1300-13060 v373 aThe effect of adult learning through an oviposition and host feeding experience was studied in two populations of Anisopteromalus calandrae (Hymenoptera: Pteromalidae), in choice and no-choice experiments in the laboratory using last instars of rice weevil, Sitophilus oryzae L., and lesser grain borer, Rhyzopertha dominica (F.), as hosts. In choice experiments, 20 wheat kernels infested by rice weevil and 20 by lesser grain borer were placed randomly in petri dish (15 by 100 mm) arenas. In no-choice experiments, 10 host-infested wheat kernels, either with rice weevils or with lesser grain borers, were mixed thoroughly in 500 g of uninfested wheat placed in a 0.945-liter glass jar (75 by 170 mm) arenas. A. calandrae females from a laboratory and field populations that were experienced with host larvae or naive were introduced singly into each experimental arena and allowed to sting and oviposit for 24 h. An oviposition experience with rice weevil or lesser grain borer had a stronger effect on host preference in choice experiments compared with experiments with naive wasps. Host-finding and parasitism rates were increased by prior experience with rice weevils in no-choice experiments. A. calandrae females clearly preferred rice weevil larvae for parasitization over larvae of lesser grain borer regardless of parasitoid population or prior experience. Also, A. calandrae females chose rice weevil larvae for producing female progeny and lesser grain borer for male progeny in choice experiments. The implications of the results of this study are discussed in relation to host preference and the selection of parasitoid populations for biological control programs in stored grains.10aSitophilus oryzae1 aGhimire, Mukti, N.1 aPhillips, Thomas, W.  uhttps://weevil.myspecies.info/effects-prior-experience-host-selection-and-host-utilization-two-populations-anisopteromalus-calandr01820nas a2200217   4500008004500000020001400045245013700059210006900196260000900265300001200274490000700286520103700293653002201330100001901352700002801371700001701399700001901416700001801435700001401453856013501467       2008                        Engldsh    a0022-474X00aCalorimetric evaluation of responses of Sitophilus oryzae and Tribolium confusum to elevated temperatures and controlled atmospheres0 aCalorimetric evaluation of responses of Sitophilus oryzae and Tr  c2008  a295-3030 v443 aMetabolic heat rates, determined by microcalorimetry, were used to measure the effect of controlled atmospheres (CAs) and elevated temperatures on the stored-product insects Sitophilus oryzae (rice weevil) and Tribolium confusum (confused flour beetle). Results for larval and adult stages in air, and in a range of low O2 and/or high CO2 CAs, at temperatures from 15 to 45 [degree]C, showed the general effectiveness of such atmospheres in lowering the lethal temperatures relative to those in air. Effects on adult S. oryzae at 25 [degree]C were explored in more detail in experiments using the following conditions: exposure to anoxic CAs for extended times; exposure to hypoxic CAs; and simulated hermetic storage. A simple scanning calorimetric method was developed for determining lethal temperatures and a combined thermo-gravimetric and differential thermal-analysis method Was used to interpret the thermal events, due to loss of water, occurring at and above these temperatures. (C) 2008 Elsevier Ltd. All rights reserved.10aSitophilus oryzae1 aDownes, C., J.1 avan Epenhuijsen, C., W.1 aLill, R., E.1 aDownes, J., E.1 aCarpenter, A.1 aBrash, D.  uhttps://weevil.myspecies.info/calorimetric-evaluation-responses-sitophilus-oryzae-and-tribolium-confusum-elevated-temperatures-and02416nas a2200181   4500008004500000020001400045245012200059210006900181260000900250300001200259490000700271520173600278653002202014100002002036700002402056700001902080856013502099       2008                        Engldsh    a0022-474X00aInsecticidal effect of spinosad dust, in combination with diatomaceous earth, against two stored-grain beetle species0 aInsecticidal effect of spinosad dust in combination with diatoma  c2008  a347-3530 v443 aLaboratory bioassays were carried out to determine the efficacy of spinosad applied alone or combined with the diatomaceous earth (DE) SilicoSec against adult rice weevils, Sitophilus oryzae and confused flour beetles, Tribolium confusum. Efficacy was assessed on wheat and maize at three dosages of spinosad dust formulation (corresponding to 0.0625, 0.1875 and 0.625 ppm of active ingredient [AI] for S. oryzae and to 0.1875, 0.625 and 1.25 ppm of AI for T. confusum), alone or combined with SilicoSec at 150 ppm for S. oryzae and 250 ppm for T. confusum. The mortality of S. oryzae exposed for 14 d on wheat treated with spinosad ranged between 83% and 100%. Conversely, the mortality of S. oryzae on maize treated with DE or on maize treated with lower doses of spinosad dust did not exceed 19% and was only 59% on maize with the highest spinosad dust treatment. Generally, the presence of SilicoSec combined with spinosad did not significantly increase S. oryzae mortality compared with spinosad alone. For T. confusum, mortality on both commodities was lower than for S. oryzae. After 14 d of exposure on wheat, mortality was 14% at the highest dose of spinosad, but increased to 33% in the presence of DE. Similar results were also obtained for T. confusum exposed on treated maize, which indicated a joint action between spinosad and DE. In the case of S. oryzae, the inclusion of DE reduced progeny production in comparison with spinosad alone. Progeny production of T. confusum was relatively low in all treatments, compared to progeny production of S. oryzae. The results of the study show the potential of combination treatments of spinosad dust and DE, but efficacy varies with the target insect species and commodity.10aSitophilus oryzae1 aChintzoglou, G.1 aAthanassiou, C., G.1 aArthur, F., H.  uhttps://weevil.myspecies.info/insecticidal-effect-spinosad-dust-combination-diatomaceous-earth-against-two-stored-grain-beetle-spe01389nas a2200181   4500008004500000020001400045245009700059210006900156260002000225300001200245490000700257520074400264653002501008653002201033100002101055700001901076856011201095       2008                        Italdan    a0425-101600aInfluence of different diets on Sitophilus granarius (L.) and S. oryzae (L.). I. Oviposition0 aInfluence of different diets on Sitophilus granarius L and S ory  c2006-2007(2008)  a101-1150 v403 aThe oviposition of Sitophilus granarius and S. oryzae was studied, at the same conditions of light, T and RH, on cereal stored grains (wheat, barley, pop-corn and yellow dent corn) and alimentary pasta (pasta containing eggs, maize pasta, brown pasta, two short shape durum wheat pasta and one long shape of the kind "Bigoli''). The total number of laid eggs and the fecundity evolution were recorded allowing to establish what sort of cereal grains and pasta is the most open to. S. granarius and S. oryzae attack. For both species wheat, barley and pasta containing eggs were the most preferred for oviposition, while the pasta "Bigoli" was the less. S. oryzae has laid eggs into all the substrates, mainly pasta, more than S. granarius.10aSitophilus granarius10aSitophilus oryzae1 aChiesa, Fiorella1 aFrilli, Franco  uhttps://weevil.myspecies.info/influence-different-diets-sitophilus-granarius-l-and-s-oryzae-l-i-oviposition02176nas a2200229   4500008004500000020001400045245011700059210006900176260000900245300001000254490000700264520135800271653002501629653002201654653002301676100002601699700001901725700001701744700002801761700002201789856013501811       2008                        Engldsh    a0370-432700aMolecular identification of Sitophilus spp. (Coleoptera Curculionidae) and detection of immature stages in wheat0 aMolecular identification of Sitophilus spp Coleoptera Curculioni  c2008  a55-580 v913 aA polymerase chain reaction (PCR)-based assay is proposed to differentiate Sitophilus granarius (L.), S. oryzae (L.), and S. zeamais Motschulsky at different life stages and to detect their hidden infestation in wheat kernels. PCR amplification of genomic DNA using primers designed on the basis of the cytochrome oxidase subunit II gene sequence, followed by agarose gel electrophoresis, Successfully detected the immature stages (egg, larva, pupa) and adult of each species. DNA amplification resulted in a PCR product of 462 bp for S. granarius, whereas S. oryzae and S. zeamais yielded a 311 bp fragment. A sequence comparison between the latter species allowed to identify a mutation that was diagnostic between S. oryzae and S. zeamais through a PCR-RFLP protocol. Digestion of DNA resulted in an uncut fragment (3 11 bp) for S. oryzae, two fragments (174 bp + 137 bp) for S. zeamais and 3 bands (250 bp + 160 bp + 52 bp) for S. granarius. Multiplex PCR reaction enabled to differentiate the three species at all life stages also when simultaneously added to and ground with a 50 g sample of wheat kernels. The reproducibility of the results and high resolution as well as the technical simplicity of the developed molecular method demonstrated its usefulness in the diagnosis of Sitophilus spp. and detection of their hidden infestation in wheat.10aSitophilus granarius10aSitophilus oryzae10aSitophilus zeamais1 aAngiolillo, Antonella1 aBoursier, Luca1 aPilla, Fabio1 aGerminara, Giacinto, S.1 aRotundo, Giuseppe  uhttps://weevil.myspecies.info/molecular-identification-sitophilus-spp-coleoptera-curculionidae-and-detection-immature-stages-wheat01651nas a2200193   4500008004500000245014000045210006900185260001000254300001200264490000600276520099900282653002201281100001901303700002101322700002101343700002601364700001401390856005301404       2008                        Engldsh  00aEffect of sorghum cultivars on population growth and grain damages by the rice weevil, Sitophilus oryzae L. (Coleoptera: Curculionidae)0 aEffect of sorghum cultivars on population growth and grain damag  cApril  a255-2580 v33 aIn northern Cameroon, the rice weevil, Sitophilus oryzae L. (Coleoptera: Curculionidae) is a major pest of Sorghum bicolor (Poaceae) during storage. This staple crop is currently damaged by many insects and others pests during storage. To reduce the post-harvest losses due to S. oryzae, many control strategies are performed. An important step to achieve successful control is to isolate and characterize the noxious activity of rice weevil present on the sorghum variety currently stored. The present study shows that the two main ecotypes of S. bicolor, the "djiigari" ecotype is very susceptible to the 7 weevils strains isolated in the region. In a period of 100 days a single female of one of the most prolific strains produces 24 adults and more than 57% of grains are attacked. In the "safraari" ecotype, the level of attack is very low. This suggests that efforts should be made to advice the farmers to prefer "safraari" ecotype in order to avoid post harvest losses due to S. oryzae.10aSitophilus oryzae1 aLadang, Y., D.1 aNgamo, L., T. S.1 aNgassoum, M., B.1 aMapongmestsem, P., M.1 aHance, T.  uhttp://www.academicjournals.org/AJAR/Archive.htm