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... Since its emergence as a pest of grapevine about 150 years ago, studies on the life cycle and mode of reproduction of grape phylloxera (Daktulosphaira vitifoliae Fitch) (Homoptera: Phylloxeridae) have been of considerable scientific interest and importance for applied viticulture. The life cycle of grape phylloxera, as described in the mid to late nineteenth century, is still subject to discussion ...
Tortricidae; pest identification; females; pheromone glands; sex pheromones; chemical composition; acetates; pest monitoring; pheromone traps; insect pests; Macadamia integrifolia; orchards; macadamia nuts; Costa Rica
... Traps baited with Z11-16: Ac, Z11-16: Ald, Z11-16:OH, and Z13-18: Ac, singly or in mixtures, were tested for their attractivity for males of microlepidoptera in an apple orchard, a mixed deciduous forest, and a coniferous forest. In particular, Z11-16: Ac and Z111-16: Ald attracted some Crambinae, one Glyphipteryx species, and several species of Argyresthia, including the injurous species A. funde ...
... (Z)-3-nonenol, (Z,Z)-3,6-nonadienol and (S,S)-(-)epianastrephin proved active as male-produced pheromones which elicited behavioral responses from virgin female Mexican fruit flies (Anastrepha ludens) (Diptera: Tephritidae) in laboratory bioassays. All three chemicals elicited attraction and/or locomotor arrest when tested individually. When tested together, (Z)-3-nonenol inhibited the behavioral ...
Elateridae; agricultural land; females; gas chromatography-mass spectrometry; headspace analysis; males; pests; sex pheromones; Alberta
Abstract:
... Sex pheromones are known for only a few major click beetle (Coleoptera: Elateridae) pests in North America. These pheromones could be used to monitor, as well as control, adult beetles. Our objective was to identify the sex pheromone of female Selatosomus aeripennis destructor (Brown), a predominant elaterid pest species in farmland in the Canadian Prairie provinces. Headspace volatiles from a gro ...
... New techniques are presented on the use of 15N to mark insects. 15N, a stable isotope of nitrogen, was enriched above natural abundance in plant and insect tissues. Two laboratory studies demonstrated that enriched 15N-concentrations could be tracked from plant to insect using mass spectrometry. In the first study, adult Cotesia plutellae (Kurdjimov) (Hymenoptera: Braconidae) and Hippodamia conver ...
... Individuals of Sitobion avenae (F.) (Homoptera: Aphididae) were marked with the stable isotope 15N through feeding on cereal seedlings which were immersed in a 15N-enriched nutrient solution. Increased 15N-contents were obtained in all aphids with no detrimental effect on survival and fertility. When 15N-marked aphids were transferred to non 15N-enriched seedlings, after a short initial decreasing ...
... The effects of 2-undecanone, a compound found in the glandular trichomes of the wild tomato, Lycopersicon hirsutum f. glabratum C. H. Mull, PI 134417, on the larvae of Heliothis zea (Boddie) and Manduca sexta (L.) were studied by rearing the larvae on artificial diets containing this chemical. 2-Undecanone increased larval mortality of H. zea in the first 48 h when combined with 2-tridecanone, but ...
... The effects of 2-undecanone, a compound found in the glandular trichomes of the wild tomato, Lycopersicon hirsutum f. glabratum C. H. Mull, PI 134417, on the larvae of Heliothis zea (Boddie) and Manduca sexta (L.) were studied by rearing the larvae on artificial diets containing this chemical. 2-Undecanone increased larval mortality of H. zea in the first 48 h when combined with 2-tridecanone, but ...
... 2-Undecanone, a compound found in the tips of the Type VI glandular trichomes of the wild tomato species Lycopersicon hirsutum f. glabratum C. H. Mull (accession PI 134417), when incorporated in artificial diet, was previously shown to cause pupal deformity and mortality among Heliothis zea (Boddie). In the present study, the developmental stage of H zea sensitive to the effects of dietary 2-undec ...
... The allelochemic, 2-tridecanone, which conditions resistance in the wild tomato Lycopersicon hirsutum f. glabratum to Manduca sexta and plays an important role in the resistance to Leptinotarsa decemlineate is shown to induce an enhanced level of tolerance to the carbamate insecticide carbaryl in a third important insect pest of tomato, Heliothis zea. This phenomenon has important implications reg ...
... Here, we describe a single micro‐CT scan with a spatial resolution of 10 μm of a 10‐day‐old adult male Schistocerca gregaria (Forskål) (Orthoptera: Acrididae) and we compare our tracheal volume (VT) determination with published work on the subject. We also illustrate the feasibility of performing non‐invasive ‘virtual dissection’ on insects after performing micro‐CT. These post‐processing steps ca ...
... Changes in morphology during early metamorphosis of the medfly, Ceratitis capitata (Wied.) (Tephritidae) were correlated with biochemical differentiation events. Protein profiles were studied both in the 3rd instar larval cuticle further transformed into puparium and the newly synthesized pupal cuticle. Beta-alanine incorporation into the puparium (0-20 h) correlates with concomitant pigmentation ...
Nematoda; Tephritidae; biological control; crop production; exports; fruit flies; fruits; horticulture; mass rearing; parasitoids; systematic review
Abstract:
... Fruit flies (Diptera: Tephritidae) are among the main pests in horticulture, impacting field crops and export markets. The biological control of fruit flies has become an important method for environmentally friendly crop production. Although biological control is an age‐old practice and the mass‐rearing of some biological agents boomed in the 1990s, efforts in fruit fly control programs still fac ...
Brassica rapa; Chinese cabbage; Nematoda; Plutella xylostella; Xenopus laevis; abamectin; crops; glutamic acid; insecticides; insects; oocytes; pest control; pests; China
Abstract:
... Diamondback moth (DBM), Plutella xylostella (L.) (Lepidoptera: Plutellidae), is one of the most destructive pests in Brassicaceae crops, such as Chinese cabbage (Brassica rapa L.). It is rapidly developing resistance to abamectin, the dominant insecticide utilized in controlling P. xylostella in China and other southeastern Asian countries. The target of abamectin, the alpha subunit of glutamate‐g ...
... Carrot fly larvae (Psila rosae (F.)) orient by olfaction to both CO₂, a primary plant metabolite, and cinnamic acid derivatives (e.g. methyl eugenol), which are secondary plant metabolites. Other examples of larval attraction by chemical food components in species that feed on either living or dead plant material can be categorised according to a number of parameters: the habitat in which the larv ...
... The pheromone of Trogoderma granarium males was subjected to two bioassays intended to examine its effect on the two sexes of the species. The tests were made with concentrations ranging from 0.1 to 200 males per ml of solvent. The weakest reaction of males and females was observed in concentrations of 0.1 and 0.4/cc respectively. The peak reaction of the males was attained in concentrations of 12 ...
... Colonies of Aphis fabae Scop, maintained on an artificial diet contained a higher proportion of apterae when they were attended by the ant Formica fusca Wheeler. When extracts of the mandibular glands of this ant and dendrolasin (a chemical known to occur in the mandibular glands of another ant) were topically applied to the aphids the proportions of apterae also increased. The results suggest tha ...
... An energy budget was constructed for A. fabae reared on synthetic diets and compared with that published for aphids living on broad bean. Larval aphids living on broad bean utilized 54% of their energy intake for growth, 4% was lost during respiration and 42% was excreted as honeydew. Aphids living on a synthetic diet utilized 26% of their energy intake for growth and 4% was lost during excretion. ...
Eurygaster integriceps; pests; population density; wheat; young adults; Iran
Abstract:
... Three methods were used to estimate simultaneously the population density of young adult bugs; their accuracy, advantages and disadvantages are discussed, using data from two wheat fields in North Iran. ...
... Post-teneral flies are much more reluctant to feed through an artificial membrane than are inexperienced, teneral flies. It is possible to separate those stimuli which are important to flies of all ages, regardless of experience, from those which become important with feeding experience. ATP is necessary at all ages if flies, following successful probing, are to suck up a blood meal. Factors such ...
... The multiplicative potential of three insecticide resistant clones of Myzus persicae (Sulz.), as measured by potential fecundity, development time and reproductive rate, was significantly greater than that of four susceptible clones reared at 22-29° on excised potato leaflets, and the potential fecundity of the resistant clones was also greater at 7-10°. Resistant clones grew better than susceptib ...
Callosobruchus maculatus; Curculionidae; cowpeas; markets; pests; weight loss
Abstract:
... Six varieties of cowpea beans, made up of four local varieties purchased from the Ibadan market and two new ones, were artificially infested with Callosobruchus maculatus (F.) in the laboratory. The varieties were compared with respect to their calculated Susceptibility Indices, pest population curves and the weight losses inflicted by the weevils. On all three criteria, two of the local varieties ...
... Thysanoptera drifting over and around a wheat field were trapped using black, green and white water traps, black cylindrical sticky traps and suction traps. Certain Taeniothrips spp., Thrips spp., and Aeolothrips spp. were strongly attracted to white but not to green or black; Limothrips cerealium Hal., Chirothrips manicatus Hal., and Stenothrips gramium Uzel were not markedly attracted to any of ...
... A calculated correction factor due to food respiration is applied to the consumption term in energy budgets for invertebrates. The factor is expressed as a function of the growth rate of the invertebrates, the food respiration rate and the fraction of food remaining when changed. It is shown that applying this correction factor to several energy budgets balances them. ...
... Individual adult female Zonocerus variegatus grasshoppers grow slowly, do not develop oocytes and have a high mortality when confined in nylon bags attached round growing cassava leaves. In contrast, similar ♀♀ fed on excised leaves grow quickly and develop large numbers of oocytes. The major effect of leaf excision is to allow the insect to ingest much greater quantities. The general importance o ...
... Field experiments carried out near Belleville, Ontario, in the summer of 1962 indicated that an airborne ultrasound broadcast at a frequency of 50 Kc/s more than halved the infestation of sweet corn (maize) by Ostrinia nubilalis (Hbn.). The pulse rate and amplitude of the sounds used resembled those of an echolocating bat. ...
... A strain of Culex quinquefasciutus with European cytoplasm and Indian chromosomes, including a male-linked translocation, was reared and males were released in two villages near Delhi which were surrounded by a 3-km wide zone kept free of mosquito production by conventional larvicides. 5000-40,000 males were released per day per village and this produced very high ratios of released to wild males. ...
dispersal behavior; pest management; spatial distribution; Gossypium hirsutum; Medicago sativa; fallow; weed hosts; geographic information systems; population density; Lygus hesperus; global positioning systems; population dynamics; Arizona
Abstract:
... Understanding the effect of cropping patterns on population dynamics, dispersal, and habitat selection of insect pests has been an unresolved challenge. Here, we studied the western tarnished plant bug, Lygus hesperus (Knight) (Heteroptera: Miridae), in cotton during early summer in central Arizona. We used a general approach based on global positioning system (GPS) and geographic information syst ...
Oncopeltus fasciatus; ancestry; hybrids; oviposition; oviposition sites; United States
Abstract:
... Oviposition site preferences were examined in descendents of milkweed bugs collected in six geographic areas and in their F₁ and F₂ hybrids. Within an area, samples were stastically homogeneous in oviposition preference across three trials. All samples from within the continental USA formed a statistically homogeneous group and, as a group, were different in oviposition preference from the Puerto ...
... By use of a recessive-genetic marker, it has been shown that adult female German cockroaches, Blattella germanica (L.), can be successfully inseminated by more than one male. Reinsemination was demonstrated to occur rarely between the first mating and production of the first egg case, while about 20% of the females examined remated between egg cases. The total impact of second matings on the offsp ...
... The repellent and acaricidal properties of known tick repellents were studied in the laboratory with an in vivo model which utilizes a natural host, the gerbil Meriones tristrami. Diethyl toluamide, benzyl benzoate and dimethyl phthalate were repellent in descending order to the pre-imaginal stages of the ixodid Hyalomma excavatum. While dimethyl phthalate was practically devoid of acaricidal prop ...
... Cultures of Agrotis segetum Schiff. are reared at room temperature (mean daily minimum and maximum 21° and 24°, respectively) and a 16-h photoperiod; they were founded, and are supplemented annually, with moths collected from the field. Eggs are disinfected in formaldehyde vapour, the larvae are kept in groups on paper tissues in plastic boxes, fed a semi-synthetic diet and provided with vermiculi ...
... A simple method is described enabling the estimation of low enzymatic activities of DDT-dehydrochlorinase. Acetone powders of the insect material are incubated with DDT-suspensions obtained by adding small amounts of DDT solutions in dimethylsulfoxide to the buffer solutions. After the reaction the mixture is extracted and the remaining substrate and the product formed are measured by gas-liquid c ...
... A mutant eye color was isolated which proved to be linked to the dominant form of DDT-mortality resistance (R) in the D+R20 substrain of the DDT 1 strain of house flies. The mutant, identified as carnation (by Hiroyoshi) is located on chromosome V; therefore, the dominant R character is on chromosome V. Since no other major resistance is present in the D+R20 strain, phenotypically susceptible line ...
Amblyseius potentillae; Metaseiulus occidentalis; Panonychus ulmi; Tetranychus evansi; Tetranychus urticae; fruit trees; greenhouse experimentation; life tables; simulation models
Abstract:
... A population simulation model that was developed for the fruit tree red spider mite (Panonychus ulmi Koch) and its phytoseiid predator (Amblyseius potentillae Garman) (Rabbinge, 1976) was adapted to Metaseiulus occidentalis Nesbitt and Tetranychus urticae Koch. The model uses life-table data for T. urticae and M. occidentalis and M. occidentalis' numerical and functional responses. The assumptions ...
... Adult rice weevils (Sitophilus oryzae (L.)) were marked with paint containing Scandium-46 and detected in a column of wheat 4.5 cm diam by means of a γ-scintillation counter. The radioactive paint had no effect on the mobility and longevity of the insects. Two weevils marked with Sc-46 could be located if they were more than 2.5 cm apart. An account is given of the use of the technique to follow t ...
Leptinotarsa decemlineata; Solanum lycopersicum var. lycopersicum; adults; eggs; fruits; larvae; leaves; population density; population dynamics; tomatoes; variance; Ontario
Abstract:
... A study of sampling variability in field populations of the Colorado potato beetle, Leptinotarsa decemlineata (Say), on tomato in eastern Ontario, showed that inter-plant variance was the major source of variation for eggs and larvae, and that intra-plant variance was the major source for adults. For eggs and larvae, the most appropriate sample unit was the basal one-sixth of the plant with its fo ...
... Volatile substances collected by various methods from laboratory and wild female Dacus oleae (Gmelin) flies attracted males of the same species during the hours of sexual activity (dusk) in laboratory and field tests. The presence of an air-borne sex pheromone in this species, previously suspected, was thus verified. Laboratory and field cage tests showed pheromonal communication between laborator ...
... The latex agglutination test has been adapted for prey-predator studies. It has been found that the most satisfactory antisera for this test can be prepared by two to three injections of 10 mg of antigen into the lymph nodes of rabbits at 7-day intervals. The reagent is stable for 3 months at 4°, and the test is as specific and sensitive as the precipitin test but has the advantage that no special ...
... Compared with adults from a wild strain, phenotypically normal-eyed heterozygotes from a stock culture of the red-eyed (r/r) recessive mutation strain were confirmed to produce brachypterous progeny relatively more abundantly. The wing character has been shown not to be linked with the r gene, but the association that has developed between them may perhaps be the result of culture methods which ha ...
... By using a large cage in the field and a system of marking, the flight activities of 36 females and 49 males of the European chafer were followed during June and July, 1954. It was found that the beetles made one to 11 flights during their life span with males averaging five flights and females 4.5. More males made eight to 11 flights than did females, and males made more flights on consecutive ev ...
... Polymorphism was studied for a number of enzyme systems in the tsetse fly Glossina morsitans. Enzyme polymorphism was observed for α-glycerophospate dehydrogenase, aldehyde oxidase and esterases. For esterases, the operation of null alleles was assumed, as otherwise no explanation could be given for the observed frequencies of the variants. Two laboratory colonies and two field populations were co ...
... Three species of Isurgus were found associated with flowering mustard plants at Trumpington, Cambridge, during late May and June. I. morionellus Holmgren, constituted 80% of the adult parasite population in 1960, and 74% in 1961. The remainder were mainly I. heterocerus Thomson, with very small numbers of Isurgus species C and Diospilus capito Nees (Hymenoptera, Braconidae). Dieldrin or DDT sprays ...
... The influence of temperature on development time and synchronisation of different stages of the summerfruit tortrix Adoxophyes orana F.v.R. was studied. With these results and additional information taken from literature, especially about mortality, a simulation model was constructed which describes the development of A. orana throughout the vegetation period. The model is a system of differential ...
... Resistance in the wild tomato Lycopersicon hirsutum f. glabratum P.I. 134417 to Manduca sexta L. is due primarily to the presence of a toxic factor. A concentrated chloroform extract from the foliage was also toxic to Heliothis zea, Keiferia lycopersicella, Aphis craccivora, A. gossypii and Myzus persicae. ...
... A mosaic disease of broad bean (Vicia fabae) was widely spread in fields near Cairo in the season of 1963. The causal virus seemed to infect only the plants belonging to the family Leguminosae. Definite symptoms of systemic mosaic infection were shown by the following species: Egyptian lupin, garden pea, broad bean and fenugreek. It did not infect cow pea, sesban, pigeon pea, French bean, chickpea ...
insect pests; cultural control; host plants; population density; Brassica oleracea var. capitata; Brassica oleracea var. gemmifera; Trifolium subterraneum; Brassica oleracea var. botrytis; Brassica rapa subsp. oleifera; insect control