Bioassays (at generation G2) with a newly collected field population (designated MN) of Plutella xylostella (L.) (Lepidoptera: Plutellidae) from Multan, Pakistan, indicated resistance to spinosad, indoxacarb, deltamethrin, abamectin, and acetamiprid. At G2 the field-derived was divided into two subpopulations, one selected (G2 G11) spinosad (Spino-SEL), whereas second left unselected (UNSEL). A significant reduction in ratio for each compound observed UNSEL at G12, indicating that...

Nine (Bacillus thuringiensis) Bt genotypes (Bts-496, FH-113, CP-1401, I-2015, I-2086, CP-1402, VH-255, MG-3 and I-802) non-transgenic genotype CIM-496 (control), were sown in an RCBD with a plot size of 206 x 170 ft to determine the correlation abiotic factors physico-morphic characters Bt cottons whitefly, Bemisia tabaci (Homoptra: Aleyrodidae) jassid, Amrasca devastans(Homoptera: Jassidae), populations. The results suggest that maximum population whitefly jassid was observed on transgenic...

Models can be useful to help understand population dynamics of insects under diverse environmental conditions and in developing strategies better manage pest species. Adult longevity fecundity Helicoverpa armigera (Hübner) were evaluated against a wide range constant temperatures (15, 20, 25, 30, 35, 37.5°C). The modified Sharpe DeMichele model described adult aging rate was used estimate physiological age. Maximum H. 973 eggs per female at 25°C decreasing 72 37.5°C. relationship between...

Habrobracon hebetor (Say) is a parasitoid of various Lepidoptera including Helicoverpa armigera (Hübner), key pest different crops and vegetables. The development both H. were simultaneously evaluated against wide range constant temperatures (10, 15, 17.5, 20, 25, 27.5, 30, 35, 37.5 40 °C). completed its from egg to adult within temperature 17.5-37.5 °C life cycle 15-40 °C. Based on the Ikemoto Takai model developmental threshold (To) thermal (K) complete immature stages, calculated as 11.6...

The study was designed to investigate the impact of water stress on varietal response cotton cultivars, Helicoverpa armigera and its associated entomophagous insects [Chrysoperla carnea (Stephens) Habrobracon hebetor (Say)] as well feasibility different Integrated Pest Management (IPM) modules for management H. armigera.For this purpose, five drought resistant genotypes i.e., FH-941, FH-187, FH-4243, FH-1000 FH-207 were sown under irrigated conditions.Larval population low stressed plants...

Dietary nutrients provide fuel for the growth and development of insects as well chemicals their tissue construction. Apis mellifera L., an important pollinator, collects nectar pollens from different plants to get nutritional needs. Honey bees use protein carbohydrates energy sources. Pollens predominantly contain proline glutamic acid (non-essential amino acids). This is first study evaluate role proline, sorbitol on bee broods. The composition diet can optimize in vitro rearing process....

The small hive beetle (SHB) Aethina tumida Murray, (Coleoptera: Nitidulidae) is an invasive pest of honey bees recently found in Korea. We investigated the influence temperature on development and survival immature SHBs. beetle's stages were exposed to different constant temperatures (15, 20, 25, 30, 35, 37 39 °C) under stable continuous dark conditions a relative humidity 75 ± 5%. All successfully developed next stage at range from 15 °C, except for egg °C wandering larvae pupae, which...

The small hive beetle (SHB) Aethina tumida Murray (Coleoptera: Nitidulidae) is an invasive pest of honey bees reported in Korea 2016. This study was carried out to understand adult performance SHBs under different temperatures and construct oviposition model as a part the population model. Newly emerged adults were subjected constant (15, 20, 25, 30, 35 37 °C), their longevity measured built afterwards. female decreases from 160.1 57.9 days with increasing temperature 20 °C. SHB males lived...

The small hive beetle (SHB) Aethina tumida Murray, (Coleoptera: Nitidulidae) is now a global invasive pest of honey bees, but its cold tolerance potential has not been yet explored. Therefore, we measured the supercooling point (SCP) different stages SHBs and also impact acclimation on their SCPs survival as measure for tolerance. Combinations temperatures (0, 3, 5, 7, 10 ∘C) hours (1, 12, 24, 35, 48 h) were used to assess SHB survival. points occurred at lower (−19.4 in wandering larvae...

Production of many crops benefits from elevated pollinator diversity and abundance. We assessed the effect pollen supplement on foraging activities Apis mellifera in strawberry greenhouse. Since bees can learn floral resources association with rewards, we tested whether offering food enhances activity consequently increases pollination by honey observed number departing returning hive entrances fixed interval 10 am to 6 pm temperature humidity recording. And checked foragers that visit...

Apis mellifera (Hymenoptera: Apidae) is an important pollinator but being threatened by Vespa velutina Vespidae), invasive predator in South Korea. Supercooling point (SCP) one of indicators cold tolerance SCP has not studied for both A. and V. velutina. Morphological factors like body traits influence fitness insects terms their thermal tolerance. Therefore, we determined SCPs honey bee, workers, wasps, workers queens, analyzed the traits; size mass on these species. This first report queen...

Abstract The small hive beetle (SHB) Aethina tumida Murray, (Coleoptera: Nitidulidae) has become a global pest of honey bees, but to date its adults’ cold tolerance not been explored. Mating increases the in some insects. Therefore, we appraised effect mating on overwintering traits; Supercooling points (SCPs) and, lower lethal temperatures. We also assayed phenotypic plasticity SHB adults and subsequent reproductive capacity females. supercooling occurred at temperatures (-10.8℃) mated...