Eclosion Time and Spatial Distribution of Overwintering Spruce Spider Mite (Acari: Tetranychidae) Eggs on Colorado Spruce

1996 ◽  
Vol 89 (2) ◽  
pp. 447-452 ◽  
Author(s):  
Douglas S. Richmond ◽  
David J. Shetlar
1973 ◽  
Vol 2 (4) ◽  
pp. 718-720 ◽  
Author(s):  
A. G. Wheeler ◽  
R. B. Colburn ◽  
R. D. Lehman

1995 ◽  
Vol 20 (1) ◽  
pp. 318-318
Author(s):  
Dayna Cooper ◽  
D. Casey Sclar ◽  
Whitney Cranshaw

1997 ◽  
Vol 22 (1) ◽  
pp. 396-396
Author(s):  
Casey Sclar ◽  
Dan Gerace ◽  
Whitney S. Cranshaw ◽  
Andrea Tupy ◽  
Mohammed Al-Doghairi

2012 ◽  
Vol 37 (3) ◽  
pp. 399-404 ◽  
Author(s):  
NK Dutta ◽  
SN Alam ◽  
MK Uddin ◽  
M Mahmudunnabi ◽  
MF Khatun

Population abundance of red spider mite, Tetranychus urticae Koch., was studied in cucmber, ribbed gourd, bitter gourd, snake gourd, aroids and teasle gourd and efficacy of four new acaricides were tested against this pest in brinjal at the farmer’s field of Norsingdi during 2009-2010. At the same time, the spatial distribution of this pest in brinjal crop was also studied. Results indicated that all the surveyed vegetables except bitter gourd were attacked by the mite with varying levels of infestation. However, the highest mite population per leaf was observed in brinjal (32.27) which was followed by cucumber (16.08) and teasle gourd (7.2). Mites were most densely populated in the lower canopy region in the brinjal plant. Among the tested acaricides, Lakad 1.8 EC (Abamectin) provided the highest (83.4%) reduction of mite population over control, although the other acaricides also gave good control of this pest. Bangladesh J. Agril. Res. 37(3): 399-404, September 2012 DOI: http://dx.doi.org/10.3329/bjar.v37i3.12083


1983 ◽  
Vol 115 (12) ◽  
pp. 1607-1614 ◽  
Author(s):  
John V. Boyne ◽  
Fred P. Hain

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.


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