Browsing by Author "Ziegler, Melissa"
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Item Child Temperament as a Moderator of Promoting First Relationships Intervention Effects Among Families in Early Head Start(Prevention Science, 2022-01-21) Hustedt, Jason T.; Hooper, Alison; Hallam, Rena A.; Vu, Jennifer A.; Han, Myae; Ziegler, MelissaAs availability of parent–child interaction curricula increases, Early Head Start (EHS) provides a relevant context to test research-based parenting models as part of everyday practice. We trained EHS staff to incorporate the Promoting First Relationships (PFR) intervention into ongoing weekly home visits with mothers and their young children (n = 102) enrolled in EHS. Children had a mean age of 19.75 months and were 56% Hispanic, 23% Black, and 14% White. Families were randomly assigned to an intervention group where they participated in PFR as an EHS enhancement, or to a waitlist-control group where they received only typical EHS services. To explore the possibility that effectiveness of parent–child curricula may differ based on child characteristics, we used linear regression to examine children’s temperament as a potential moderator of PFR efficacy on outcomes related to parenting stress, family functioning, and parent–child interaction. While we did not find a significant main effect of PFR for the full sample, there were several significant moderated effects. For families where children showed higher levels of surgency, mothers’ parenting stress was significantly reduced after PFR participation. Also, when children showed higher levels of negative affect, mothers demonstrated higher sensitivity in parent–child interactions after participating in PFR. Given findings from our exploratory study, agencies should consider the characteristics of families served and the match with intervention priorities, when selecting intervention programs. When delivered as a home visitation enhancement, PFR may be a valuable support for certain enrolled families, based on child characteristics including high levels of surgency or negative affect.Item Common ragweed (Ambrosia artemisiifolia L.) accessions in the Mid-Atlantic region resistant to ALS-, PPO-, and EPSPS-inhibiting herbicides(Weed Technology, 2024-03-08) D’Amico Jr. , Frank; Besanҫon, Thierry; Koehler, Alyssa; Shergill, Lovreet; Ziegler, Melissa; VanGessel, MarkCommon ragweed is a troublesome weed in many crops. Farmers and crop advisors in the coastal Mid-Atlantic region have reported inadequate control of common ragweed in soybean fields with glyphosate and other herbicide modes of action. To determine whether herbicide resistance was one of the causes of poor herbicide performance, 29 accessions from four states (Delaware, Maryland, New Jersey, and Virginia) where common ragweed plants survived herbicide applications and produced viable seeds were used for greenhouse screening. Common ragweed seedlings from those accessions were treated with multiple rates of cloransulam, fomesafen, or glyphosate, applied individually postemergence (POST). All accessions except one demonstrated resistance to at least one of the herbicides applied at twice the effective rate (2×), 17 accessions were two-way resistant (to glyphosate and cloransulam, or to glyphosate and fomesafen), and three-way resistance was present in eight accessions collected from three different states. Based on the POST study, five accessions were treated preemergence (PRE) with herbicides that inhibit acetolactate synthase (ALS), and two accessions were treated with herbicides that inhibit protoporphyrinogen oxidase (PPO). All accessions treated PRE with the ALS inhibitors chlorimuron or cloransulam demonstrated resistance at the 2× rates. Both accessions treated PRE with the PPO inhibitor sulfentrazone had survivors at the 2× rate. When the same accessions were treated PRE with fomesafen, one had survivors at the 2× rate, and one had survivors at the 1× rate. Results from these tests confirmed common ragweed with three-way resistance to POST herbicides is widespread in the region. In addition, this is the first confirmation that common ragweed accessions in the region are also resistant to ALS- or PPO-inhibiting herbicides when applied PRE.