Marking Gypsy Moth (Lepidoptera: Lymantriidae) Life Stages and Products with Low Doses of Rubidium Injected or Implanted into Pin Oak

1990 ◽  
Vol 83 (6) ◽  
pp. 2343-2348 ◽  
Author(s):  
S. J. Fleischer ◽  
F. W. Ravlin ◽  
D. Delorme ◽  
R. J. Stipes ◽  
M. L. McManus
Keyword(s):  
Gypsy Moth ◽  
Low Doses ◽  
Life Stages

Low Doses of a Neonicotinoid Stimulate Reproduction in a Beneficial Predatory Insect

2020 ◽  
Vol 113 (5) ◽  
pp. 2179-2186
Author(s):  
R R Rix ◽  
G C Cutler
Keyword(s):  
Life History Traits ◽  
Insect Pests ◽  
Low Doses ◽  
Life Stages ◽  
Stink Bug ◽  
Biological Control Agents ◽  
Two Generations ◽  
Predatory Insect ◽  
Major Reduction ◽  
Stimulation Of

Abstract Biological stimulation induced by low doses of toxicants or other stressors is known as hormesis. Hormetic stimulation of life history traits in insect pests can negatively impact agriculture, but stimulation of beneficial insects could be leveraged to enhance biological control agents. We examined whether low doses of imidacloprid could enhance oviposition, fecundity, fertility, and survival in the beneficial stink bug predator, Podisus maculiventris (Say) (Hemiptera: Pentatomidae), exposed at different life stages and across two generations. When treated as young adults, P. maculiventris fecundity was stimulated at 0.5 and 1.0 mg/liter imidacloprid (<2% of the field rate) without changes in time to oviposition, fertility, and survival. Nymphs exposed to 0.015 mg/liter imidacloprid (<1% of the field rate) also had stimulated reproduction without effects on oviposition, fertility, and survival, but treatment of nymphs at 0.15 and 1.5 mg/liter imidacloprid stimulated fecundity at the expense of fertility and survival. In another experiment we found reproductive stimulation can occur trans-generationally without major reduction in fertility or survival. Our results suggest biocontrol producers may be able to strategically apply low doses of stress to natural enemies during culturing without compromising fitness in subsequent generations.

1992 Gypsy Moth Programs in the Southeast

1994 ◽  
Vol 29 (3) ◽  
pp. 381-397
Author(s):  
G. Keith Douce ◽  
Robert D. Hamilton ◽  
Gary L. Clement
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Local Governments ◽  
Insect Pests ◽  
Federal State ◽  
Life Stages ◽  
Commercial Vehicles ◽  
Forest Insect ◽  
State And Local ◽  
Southeastern Region

The gypsy moth, Lymantria dispar (L.), has been one of the most destructive hardwood forest insect pests in the northeastern U.S. since it was accidentally introduced in the late 1860's. The U. S. range of the insect has expanded annually by a few kilometers through natural spread. However, gypsy moth range expansion has been greatly mitigated by accidental transport of life stages on recreational and commercial vehicles and on outdoor household articles. They gypsy moth is one of two forest insects that are under Federal Domestic Quarantine enacted in 1912. Since the late 1800's Federal, State, and local governments have worked cooperatively in trying to eradicate, suppress, and/or control gypsy moth populations. Thousands of worker-hours and millions of dollars are expended annually on these cooperative projects. Although the goals of these projects are developed and implemented cooperatively, comprehensive summarizations of these efforts are limited. This study was designed to summarize and document the results of the 1992 cooperative gypsy moth survey projects in eight states that comprise the USDA-APHIS-PPQ southeastern region.

The Response of Testes Cells to Low Level, Single dose Helium Particle Irradiation

1982 ◽  
Vol 40 ◽  
pp. 252-253
Author(s):  
D.E. Philpott ◽  
W. Sapp ◽  
C. Williams ◽  
J. Stevenson ◽  
S. Black ◽  
...  
Keyword(s):  
Stem Cell ◽  
Single Dose ◽  
B Cell ◽  
Cell Survival ◽  
Spermatogonial Stem Cell ◽  
Low Doses ◽  
Particle Irradiation ◽  
Stem Cell Survival ◽  
Irradiation Injury ◽  
Radio Sensitivity

Spermatogonial stem-cell survival after irradiation injury has been studied in rodents by histological counts of surviving cells. Many studies, including previous work from our laboratory, show that the spermatogonial population demonstrates a heterogeneous response to irradiation. The spermatogonia increase in radio-sensitivity as differentiation proceeds through the sequence As - Apr - A1 - A2 - A3 - A4 - In - B. The stem (As) cell is the most resistant and the B cell is the most sensitive. The purpose of this work is to investigate the response of spermatogonial cell to low doses (less than 10 0 rads) of helium particle irradiation.

Potentiation of bromotrichloromethane hepatotoxicity in male rats exposed to 10 ppm dietary chlordecone: Electron Microscopic and biochemical study

1990 ◽  
Vol 48 (3) ◽  
pp. 284-285
Author(s):  
O. M. Faroon ◽  
R. W. Henry ◽  
M. G. Soni ◽  
H. M. Mehendale
Keyword(s):  
Free Radical ◽  
Biochemical Study ◽  
Prior Exposure ◽  
Male Rats ◽  
Cellular Injury ◽  
Low Doses ◽  
Mixed Function Oxidase ◽  
Electron Microscopic ◽  
Potent Inducer ◽  
Cellular Energy

Previous work has shown that mirex undergoes photolytic dechlorination to chlordecone (CD) (KeponeR) in the environment. Much work has shown that prior exposure to nontoxic levels of CD causes potentiation of hepatotoxicity and lethality of CCl4, BrCCl3 and other halomethane compounds. Potentiation of bromotrichloromethane hepatotoxicity has been associated with compounds that stimulate the activity of hepatic mixed-function oxidase (MFO). An increase in the metabolism of halomethane by the MFO to a free radical initiates peroxidative decomposition of membranal lipids ending in massive cellular injury. However, not all MFO inducers potentiate BrCCl3 hepatotoxicity. Potentiation by much larger doses of phenobarbital is minimal and th at by a more potent inducer of MFO, mirex, is negligible at low doses. We suggest that the CD and bromotrichloromethane interaction results in a depletion of cellular energy and thereby reducing the cellular ability to undergo mitosis.

Low doses of pamidronate to treat osteopenia in children with severe cerebral palsy: a pilot study

2006 ◽  
Vol 48 (09) ◽  
pp. 709 ◽  
Author(s):  
Horacio Plotkin ◽  
Susan Coughlin ◽  
Rose Kreikemeier ◽  
Kathryn Heldt ◽  
Matias Bruzoni ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Pilot Study ◽  
Low Doses

Before I Die

GeroPsych ◽  
2018 ◽  
Vol 31 (3) ◽  
pp. 151-162 ◽  
Author(s):  
Qiao Chu ◽  
Daniel Grühn ◽  
Ashley M. Holland
Keyword(s):  
End Of Life ◽  
Psychosocial Development ◽  
Time Horizon ◽  
Development Theory ◽  
Life Stages ◽  
Socioemotional Selectivity Theory ◽  
Socioemotional Selectivity ◽  
Time Horizons

Abstract. We investigated the effects of time horizon and age on the socioemotional motives underlying individual’s bucket-list goals. Participants were randomly assigned to one of three time-horizon conditions to make a bucket list: (1) an open-ended time horizon (Study 1 & 2), (2) a 6-month horizon (i.e., “Imagine you have 6 months to live”; Study 1 & 2), and (3) a 1-week horizon (Study 2). Goal motives were coded based on socioemotional selectivity theory and psychosocial development theory. Results indicated that time horizon and age produced unique effects on bucket-list goal motives. Extending past findings on people’s motives considering the end of life, the findings suggest that different time horizons and life stages trigger different motives.

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