Survival and development of Amblypelta nitida Stål, A. l. lutescens Distant (Hemiptera: Coreidae) and the egg parasitoid, Anastatus sp. (Hymenoptera: Eupelmidae) at constant rearing temperatures

The effects of constant rearing temperatures on the development and survival of Amblypelta nitida, Amblypelta lutescens lutescens (Hemiptera: Coreidae) and their egg parasitoid, Anastatus sp. (Hymenoptera: Eupelmidae), were studied in the laboratory. Amblypelta nitida and A. l. lutescens survival and development were studied at 10,15, 20, 25,30 and 35 degrees C. The development rate of both species increased linearly with increasing temperature but insects only developed to adults at 20, 25 and 30 degrees C; at these temperatures, mean development times for A. nitida were 87, 64 and 29 days and forA. l. lutescens they were 93, 65 and 31 days respectively. No eggs of either species hatched at 10 degrees C and only A l. lutescens eggs hatched at 35 degrees C At all temperatures at which insects developed beyond the first instar, mortality rates were highest in the second instar for both species. Lower developmental threshold temperatures to complete development were 15.9 degrees C and 17.1 degrees C for A. nitida and A. l. lutescens respectively; A. nitida required 421 degree-days and A.l. lutescens required 404 degree-days to complete development. Anastatus sp. completed development at all six study temperatures and development times decreased from 54 days at 17.5 degrees C to 16 days at 30 degrees C; similarly Anastatus sp, survival increased with increasing temperature. The lower developmental threshold temperature and degree-days required for Anastatus sp. to complete development were 15.0 degrees C and 234 degree-days respectively. Results are discussed with respect to the different geographical distributions of A. nitida and A. l. lutescens and likely interactions with Anastatus sp. (C) 2016 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society. Published by Elsevier B.V. All rights reserved

School Sense of Community, Teacher Support, and Students\u2019 School Safety Perceptions

This study examined the association between two characteristics of school climate (sense of community and teacher support, measured both at the individual and at the school level) and students\u2019 feelings of being unsafe at school. The study involved a sample of 49,638 students aged 10\u201318 years who participated in the 2010\u20132012 California Healthy Kids Survey. Using hierarchical linear modeling (HLM), our findings revealed that, at the individual level, students perceiving higher levels of sense of community and teacher support at school were less likely to feel unsafe within the school environment. At the school level, sense of community was negatively associated with unsafe feelings, whereas there was no association between school-level teacher support and feelings of being unsafe at school

Instruments for Dual-Factor Mental Health Screening in Elementary Schools: Implications in Mental Health Classification

This research study holds practical significance for educators, school administrators, and mental health professionals. The study utilized structural equation modeling on two samples of elementary school students in grades three to five to create and validate condensed versions of the Social-Emotional Health Survey-Primary and the Me and My School questionnaire. These abbreviated scales exhibited strong internal validity and reliability across grade levels and genders, allowing for the assessment of wellness and distress among a diverse range of elementary school students. Furthermore, data from a longitudinal sample investigated dual-factor mental health profiles and their consistency over one year. Based on the newly validated scales, the wellness and distress indicators revealed three distinct profiles: Flourishing, Moderate, and Languishing. The transitions of students across these profiles emphasize the importance of routine mental health screening, at least once annually, to identify and address students’ needs

Helicoverpa armigera preference and performance on three cultivars of short-duration pigeonpea (Cajanus cajan): the importance of whole plant assays

BACKGROUND Helicoverpa armigera is a major pest of pigeonpea (Cajanus cajan). Efforts to develop pigeonpea varieties resistant to H. armigera attack have been met with limited success, despite reports of high levels of resistance to H. armigera in wild relatives of pigeonpea and reports of low to moderate levels of resistance in cultivated varieties. Here we examined H. armigera oviposition preference and larval performance on whole plants of three cultivars of short-duration pigeonpea: a susceptible control (ICPL 87) and two cultivars with purported host–plant resistance (ICPL 86012 and ICPL 88039). RESULTS In our no-choice oviposition experiment, H. armigera laid similar numbers of eggs on all three cultivars tested, but under choice conditions moths laid slightly more eggs on ICPL 88039. Larval growth and development were affected by cultivar, and larvae grew to the largest size (weight) and developed fastest on ICPL 86012. Moths laid most of their eggs on floral structures, sites where subsequent early instar larvae overwhelmingly fed. Experimentally placing neonate larvae at different locations on plants demonstrated that larvae placed on flowers experienced greater survival, faster development, and greater weight gain than those placed on leaves. The type and density of trichomes (a potential resistance trait) differed among cultivars and plant structures, but larvae selected to feed at sites where trichomes were absent. CONCLUSION Future work examining host–plant resistance against H. armigera should incorporate the behavioural preference of moths and larvae in experiments using whole plants as opposed to bioassays of excised plant parts in Petri dishes. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry

What Defines a Host? Oviposition Behavior and Larval Performance of Spodoptera frugiperda (Lepidoptera: Noctuidae) on Five Putative Host Plants

When an invasive species first breaches quarantine and establishes in yet another country, it invariably causes consternation for growers, in part because of incomplete understanding of the plants that are at risk. The Fall Armyworm, Spodoptera frugiperda (J.E. Smith) is the most recent example in Australia. The number of plants that this polyphagous noctuid is reported to attack is vast, including many crop species. Consequently, initial reactions from grower industry groups that perceived themselves at risk were to demand emergency use of insecticides. Yet the field evidence suggests that many crops might not be at risk and since S. frugiperda arrived in Australia, maize crops have suffered most damage, followed by sorghum. We question the accuracy of some of the claims of reported host plants of S. frugiperda and report experiments that compared oviposition behavior, neonate silking behavior, and larval performance on five crops: the known hosts maize and sorghum, and the putative hosts cotton, peanut, and pigeon pea. Maize ranked highest in all preference and performance measures, followed by sorghum and peanut, with pigeon pea and cotton ranking lowest. Although S. frugiperda can survive, develop, and pupate on the crop species we examined, cotton and pigeon pea are not preferred by the pest in either the larval or adult stages. We suggest that before a plant is listed as a host for a given insect that the evidence should be fully reported and carefully evaluated. Collecting an immature insect from a plant does not make that plant a host

What Defines a Host? Oviposition Behavior and Larval Performance of Spodoptera frugiperda (Lepidoptera: Noctuidae) on Five Putative Host Plants

When an invasive species first breaches quarantine and establishes in yet another country, it invariably causes consternation for growers, in part because of incomplete understanding of the plants that are at risk. The Fall Armyworm, Spodoptera frugiperda (J.E. Smith) is the most recent example in Australia. The number of plants that this polyphagous noctuid is reported to attack is vast, including many crop species. Consequently, initial reactions from grower industry groups that perceived themselves at risk were to demand emergency use of insecticides. Yet the field evidence suggests that many crops might not be at risk and since S. frugiperda arrived in Australia, maize crops have suffered most damage, followed by sorghum. We question the accuracy of some of the claims of reported host plants of S. frugiperda and report experiments that compared oviposition behavior, neonate silking behavior, and larval performance on five crops: the known hosts maize and sorghum, and the putative hosts cotton, peanut, and pigeon pea. Maize ranked highest in all preference and performance measures, followed by sorghum and peanut, with pigeon pea and cotton ranking lowest. Although S. frugiperda can survive, develop, and pupate on the crop species we examined, cotton and pigeon pea are not preferred by the pest in either the larval or adult stages. We suggest that before a plant is listed as a host for a given insect that the evidence should be fully reported and carefully evaluated. Collecting an immature insect from a plant does not make that plant a host

Confirming the identity of the Hypogeococcus species (Hemiptera: Pseudococcidae) associated with Harrisia martinii (Labour.) Britton (Cactaceae) in Australia: implications for biological control

Determining the identity of potential control agents is critical to successful biological control and can contribute to our understanding of the failures of previous introductions, especially in cases where host-associated cryptic species may be present. In 1975, a mealybug was introduced into Australia from Argentina for the classical biological control of the invasive cactus Harrisia martinii (Cactaceae). This cactus also originates from Argentina and is an environmental and agricultural weed in parts of Australia. Since its release, the imported mealybug species has been incorrectly referred to as Hypogeococcus festerianus (Hemiptera: Pseudococcidae) in the applied literature, and its performance as a biological control agent has been considered poor in some locations. In this study, the identities of mealybug specimens collected from 10 locations in Queensland and New South Wales, Australia, were assessed. The genetic, morphological and reproductive characteristics of these specimens were compared with those of two congeneric mealybug species, Hypogeococcus pungens sensu stricto (Hemiptera: Pseudococcidae) and Hypogeococcus festerianus. Specimens from the different Australian localities examined were all very similar to each other morphologically and genetically, based on comparisons of mitochondrial and nuclear DNA sequence data. The morphological features of all the specimens were typical of Hypogeococcus pungens sensu stricto. H. pungens is now considered to constitute a species complex, and the specimens from Australia are genetically similar to the Cactaceae clade of this species complex from Argentina. In common with H. pungens s. s., the insects collected in Australia can also reproduce parthenogenetically. These findings help confirm that all populations of the mealybug in Australia are not H. festerianus, but part of the H. pungens cryptic species complex. There is no mismatch between this agent and the host plant in Australia, as H. martinii is one of the host plants of the most closely related cryptic species of H. pungens in the native range in Argentina. Thus, despite the original confusion around its identity, the variable performance of the introduced mealybug as a biological control agent of H. martini in Australia is likely due to other factors, and these require further investigation

Diminished Adolescent Social Well-Being During the COVID-19 Pandemic

Managing the COVID-19 pandemic involved implementing public health policies that disrupted students\u27 lives, creating conditions that substantially influenced their mental health and well-being. Subsequently, research focused don the mental health sequelae of increased depression and anxiety, but the possible impacts on adolescents\u27 social well-being have been largely unexamined. Social well-being is essential to youth\u27s overall mental health and can be diminished even without symptoms of depression and anxiety. This report explored heterogeneities in changes in adolescents\u27 social well-being from pre-COVID-19 to post-restrictions using longitudinal data from adolescents attending middle and high schools in California (N = 1,299; 49.9% female). Data collection involved four observations. Participants completed a school-based mental health wellness survey annually from 2019 to 2022. A latent profile analysis identified five profiles demonstrating distinctive social well-being trajectories. Two ordered profiles included Stable-High (28%) and Stable-Low (26%) patterns. Three groups represented nonordered profiles labeled as Succumbing (20%), Languishing (14%), and Recovering (12%). Pervasive decreases in social well-being were observed, and a significant portion of the adolescents did not recover to their pre-COVID-19 level by 2022. Adolescents in the Stable-High and Recovering profiles showed better psychological well-being, optimism, and school connectedness and less distress than their counterparts in the other three profiles. Mental health professionals should be aware of the pandemic\u27s effects on adolescents\u27 social well-being. Lower levels of social well-being may be a risk factor for adolescents developing generally jaded attitudes about their social networks and diminishing their potential engagement with sources of social support

Pigeon pea crop stage strongly influences plant susceptibility to Helicoverpa armigera (Lepidoptera: Noctuidae)

Helicoverpa armigera Hübner (Lepidoptera: Noctuidae; Hübner) is the major insect pest of pigeon pea [Cajanus cajan; Fabales: Fabaceae; (L.) Millspaugh] worldwide. Research to develop pest management strategies for H. armigera in pigeon pea has focused heavily on developing less susceptible cultivars, with limited practical success. We examined how pigeon pea crop stage influences plant susceptibility to H. armigera using a combination of glasshouse and laboratory experiments. Plant phenology significantly affected oviposition with moths laying more eggs on flowering and podding plants but only a few on vegetative plants. Larval survival was greatest on flowering and vegetative plants, wherein larvae mostly chose to feed inside flowers on flowering plants and on the adaxial surface of expanding leaves on vegetative plants. Larval survival was poor on podding plants despite moths laying many eggs on plants of this stage. When left to feed without restriction on plants for 7 days, larvae feeding on flowering plants were >10 times the weight of larvae feeding on plants of other phenological stages. On whole plants, unrestricted larvae preferred to feed on pigeon pea flowers and on expanding leaves, but in no-choice Petri dish assays H. armigera larvae could feed and survive on all pigeon pea reproductive structures. Our results show that crop stage and the availability of flowers strongly influence pigeon pea susceptibility to H. armigera. An increased understanding of H. armigera-pigeon pea ecology will be useful in guiding the development of resistant varieties and other management tactics