Pink Boll worm (Lepidoptera: Gelechiidae), Cabbage Looper, and Beet Army worm (Lepidoptera: Noctuidae) Pupal Susceptibility to Steinernematid Nematodes (Rhabditida: Steinernematidae)

1995 ◽  
Vol 88 (4) ◽  
pp. 835-839 ◽  
Author(s):  
T. J. Henneberry ◽  
J. E. Lindegren ◽  
Forlow L. Jech ◽  
R. A. Burke
Keyword(s):  
Cabbage Looper ◽  
Lepidoptera Noctuidae ◽  
Beet Army Worm ◽  
Army Worm

SYNERGISM OF PYRETHROIDS BY PIPERONYL BUTOXIDE AND MGK-264 AGAINST HELIOTHIS VIRESCENS, SPODOPTERA EXIGUA, AND SPODOPTERA FRUGIPERDA (LEPIDOPTERA: NOCTUIDAE)1

1988 ◽  
Vol 23 (3) ◽  
pp. 229-233
Author(s):  
J. A. Joyce ◽  
R. J. Ottens ◽  
G. A. Herzog ◽  
M. H. Bass
Keyword(s):  
Spodoptera Frugiperda ◽  
Heliothis Virescens ◽  
Spodoptera Exigua ◽  
Synergistic Effects ◽  
Fall Armyworm ◽  
Piperonyl Butoxide ◽  
Tobacco Budworm ◽  
Lepidoptera Noctuidae ◽  
Beet Army Worm ◽  
Army Worm

Laboratory cultures of field-collected larval tobacco budworm, Heliothis virescens (F.), beet army worm, Spodoptera exigua (Hübner), and fall armyworm, S. frugiperda (J. E. Smith) were bioassayed for response to three pyrethroids in combination with piperonyl butoxide (PBO), or MGK-264. The greatest synergistic effects were seen in S. exigua which also displayed the greatest tolerance to pyrethroids without synergists. The highest SR50 (synergist ratio) value for S. exigua was 22.1 with fenvalerate-PBO mixed in a ratio of 1:5, the highest for S. frugiperda was 4.6 with fenvalerate-MGK-264 1:5, and the highest for H. virescens was 1.3 with permethrin-MGK-264 1:5 or with fenvalerate-PBO 1:5.

Natural Enemies of the Sugar Beet Army Worm, Spodoptera exigua (Lepidoptera: Noctuidae) in Northeast Iran

2018 ◽  
Vol 127 (5) ◽  
pp. 446-464 ◽  
Author(s):  
Reyhaneh Darsouei ◽  
Javad Karimi ◽  
Mohammad Ghadamyari ◽  
Mojtaba Hosseini
Keyword(s):  
Sugar Beet ◽  
Natural Enemies ◽  
Spodoptera Exigua ◽  
Lepidoptera Noctuidae ◽  
Beet Army Worm ◽  
Northeast Iran ◽  
Army Worm

Effects of host plant,Gossypium hirsutum L., on sexual attraction of cabbage looper moths,Trichoplusia ni (Hübner) (Lepidoptera: Noctuidae)

1994 ◽  
Vol 20 (11) ◽  
pp. 2959-2974 ◽  
Author(s):  
P. J. Landolt ◽  
R. R. Heath ◽  
J. G. Millar ◽  
K. M. Davis-Hernandez ◽  
B. D. Dueben ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Host Plant ◽  
Trichoplusia Ni ◽  
Sexual Attraction ◽  
Cabbage Looper ◽  
Gossypium Hirsutum L ◽  
Lepidoptera Noctuidae

RELATION BETWEEN POD DAMAGE CAUSED BY LARVAE OF BERTHA ARMYWORM, MAMESTRA CONFIGURATA WALKER (LEPIDOPTERA: NOCTUIDAE), AND YIELD LOSS, SHELLING, AND SEED QUALITY IN CANOLA

1987 ◽  
Vol 119 (4) ◽  
pp. 365-369 ◽  
Author(s):  
G.K. Bracken
Keyword(s):  
Yield Loss ◽  
Seed Quality ◽  
Control Measures ◽  
Feeding Duration ◽  
Plot Yield ◽  
Control Decision ◽  
Field Plots ◽  
Lepidoptera Noctuidae ◽  
Army Worm ◽  
Bertha Armyworm

AbstractCanola plants in 0.84-m2 field plots were exposed to 120 bertha army worm larvae per square metre, beginning at mid 5th instar, for increasing durations. Yield loss increased with feeding duration throughout the feeding period whereas the proportion of pods damaged increased rapidly at first then leveled at 45%. Pod damage was negatively correlated with plot yield but the regression was not statistically significant. More seed shelled from plants with damaged pods than from plants with no pod damage under field conditions simulating drying in the swath. Seed from damaged pods had greater proportions of green and broken seeds causing lower seed grade and these defects were evident in seed from plots with 21% or more damaged pods. Although control measures for bertha armyworm should not be undertaken before pod damage is observed, a control decision should be made before 20% of the pods are damaged.

Development and ultrastructure of sex-pheromone gland cells in females of the cabbage looper moth, Trichoplusia ni (Hübner) (Lepidoptera: Noctuidae)

1979 ◽  
Vol 57 (1) ◽  
pp. 220-236 ◽  
Author(s):  
Jean Percy
Keyword(s):  
Sex Pheromone ◽  
Trichoplusia Ni ◽  
Cabbage Looper ◽  
Apical Plasma Membrane ◽  
Tubular Structures ◽  
Gland Cells ◽  
Cabbage Looper Moth ◽  
Sex Pheromone Gland ◽  
Lepidoptera Noctuidae ◽  
Tubular Endoplasmic Reticulum

The sex-pheromone-producing gland in female Trichoplusia ni (Hübner) is a modified intersegmental membrane and the gland cells are ductless. Lipid spheres are located throughout gland cells and vary both in number and size relative to the age of the female. Most of the lipid is surrounded by oval to elongate distensions of smooth tubular endoplasmic reticulum which contain the enzyme catalase and are thus microperoxisomes. Lipid spheres evert the apical plasma membrane between microvilli, move away from the gland cells, and are stored in the cuticle as discrete lipid deposits. These deposits, in turn, move to the surface of the gland by tubular structures that differ from epicuticular filaments.

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