RESPONSES OF NEOSEIULUS FALIACIS (ACARINA: PHYTOSEIIDAE) TO DIFFERENT PREY DENSITIES OF OLIGONYCHUS UNUNGUIS (ACARINA: TETRANYCHIDAE) AND TO DIFFERENT RELATIVE HUMIDITY REGIMES

1983 ◽  
Vol 115 (12) ◽  
pp. 1607-1614 ◽  
Author(s):  
John V. Boyne ◽  
Fred P. Hain
Keyword(s):  
Relative Humidity ◽  
Population Growth ◽  
Spider Mite ◽  
Fraser Fir ◽  
Neoseiulus Fallacis ◽  
Oligonychus Ununguis ◽  
Controlled Conditions ◽  
Laboratory Development ◽  
Spruce Spider Mite ◽  
Phytoseiid Predator

AbstractThe effectiveness of the phytoseiid predator Neoseiulus fallacis in controlling population growth of the spruce spider mite, Oligonychus ununguis was examined in the laboratory. Development and fecundity of N. fallacis under various relative humidity levels were also studied. Under controlled conditions, N. fallacis significantly limited population growth of O. ununguis on Fraser fir seedlings. Survival, development, and fecundity of N. fallacis were similar for all relative humidity ranges tested, except at the lowest range (60–65%), in which none of the individuals survived to maturity.

EFFECTS OF CONSTANT TEMPERATURE, RELATIVE HUMIDITY, AND SIMULATED RAINFALL ON DEVELOPMENT AND SURVIVAL OF THE SPRUCE SPIDER MITE (OLIGONYCHUS UNUNGUIS)

1983 ◽  
Vol 115 (1) ◽  
pp. 93-105 ◽  
Author(s):  
John V. Boyne ◽  
Fred P. Hain
Keyword(s):  
Relative Humidity ◽  
Intrinsic Rate ◽  
Developmental Time ◽  
Reproductive Rate ◽  
Natural Increase ◽  
Simulated Rainfall ◽  
Net Reproductive Rate ◽  
Fraser Fir ◽  
Oligonychus Ununguis ◽  
Rate Of Increase

AbstractExperiments were conducted on Fraser fir, Abies fraseri (Pursh) Poir, seedlings or cut terminals. Results indicate that Oligonychus ununguis (Jacobi) responds most favorably to temperatures approximating 26 °C and to relative humidity levels approaching 50 to 60%. Developmental time, time to 50% mortality, net reproductive rate, mean generation time, intrinsic rate of natural increase, finite rate of increase, and days for populations to double were computed for each temperature and relative humidity regime. Simulated rainfall severely limits population density on Fraser fir seedlings.

Stethorus punctillum 1 Associated with Spruce Spider Mite 2 on Ornamentals

1973 ◽  
Vol 2 (4) ◽  
pp. 718-720 ◽  
Author(s):  
A. G. Wheeler ◽  
R. B. Colburn ◽  
R. D. Lehman
Keyword(s):  
Spider Mite ◽  
Spruce Spider Mite ◽  
Stethorus Punctillum

scholarly journals Amblyomma rotundatum (Koch, 1844) (Acari: Ixodidae) two-host life-cycle on Viperidae snakes

2010 ◽  
Vol 19 (3) ◽  
pp. 174-178 ◽  
Author(s):  
Daniel Sobreira Rodrigues ◽  
Ricardo Maciel ◽  
Lucas Maciel Cunha ◽  
Romário Cerqueira Leite ◽  
Paulo Roberto de Oliveira
Keyword(s):  
Life Cycle ◽  
North America ◽  
Relative Humidity ◽  
Total Duration ◽  
Ixodid Tick ◽  
Natural Conditions ◽  
South Central ◽  
Controlled Conditions ◽  
In Captivity ◽  
Host Life

Amblyomma rotundatum is an ixodid tick that infests ectothermic animals and reproduces exclusively by parthenogenesis. This tick has been frequently reported to infest reptiles and amphibians, under natural conditions and sometimes in captivity. It was described in Brazil and several other countries of South, Central and North America. Although many studies have reported aspects of its biology, none of them has used regularly either ophidian as hosts, or controlled temperature, humidity and luminosity for parasitic stages. The objective of this experiment was to study the life cycle of A. rotundatum feeding on Viperidae snakes under room controlled conditions at 27 ± 1 ºC temperature, 85 ± 10% relative humidity and 12:12 hours photoperiod for parasitic stages, and under B.O.D incubator conditions at 27 ± 1 ºC temperature, 85 ± 10% relative humidity and scotophase for non-parasitic stages. The total duration of the life cycle ranged from 56 to 163 days (mean of 105 days). Two-host life cycle was observed for most of the ixodid population studied.

Sign in / Sign up

Export Citation Format

Share Document