scholarly journals On-Plant Movement and Feeding of Western Bean Cutworm (Lepidoptera: Noctuidae) Early Instars on Corn

2012 ◽  
Vol 41 (6) ◽  
pp. 1494-1500 ◽  
Author(s):  
S. V. Paula-Moraes ◽  
T. E. Hunt ◽  
R. J. Wright ◽  
G. L. Hein ◽  
E. E. Blankenship
Keyword(s):  
Western Bean Cutworm ◽  
Plant Movement ◽  
Lepidoptera Noctuidae

scholarly journals Ecology and Management of the Western Bean Cutworm (Lepidoptera: Noctuidae) in Corn and Dry Beans

2010 ◽  
Vol 1 (1) ◽  
pp. A1-A10 ◽  
Author(s):  
Andrew P. Michel ◽  
Christian H. Krupke ◽  
Tracey S. Baute ◽  
Christina D. Difonzo
Keyword(s):  
Dry Beans ◽  
Western Bean Cutworm ◽  
Lepidoptera Noctuidae

The movement and distribution of Helicoverpa armigera (Hübner) larvae on pea plants is affected by egg placement and flowering

2010 ◽  
Vol 100 (5) ◽  
pp. 591-598 ◽  
Author(s):  
L.E. Perkins ◽  
B.W. Cribb ◽  
J. Hanan ◽  
M.P. Zalucki
Keyword(s):  
Helicoverpa Armigera ◽  
Nutritive Value ◽  
Economic Loss ◽  
Flowering Plants ◽  
Wild Type Plant ◽  
Indigenous Plants ◽  
Garden Pea ◽  
Helicoverpa Armígera ◽  
Plant Movement ◽  
Lepidoptera Noctuidae

AbstractThe distribution and movement of 1st instar Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larvae on whole garden pea (Pisum sativum L.) plants were determined in glasshouse trials. This economically-important herbivore attacks a wide variety of agricultural, horticultural and indigenous plants. To investigate the mechanisms underlying larval intra-plant movement, we used early-flowering and wild-type plant genotypes and placed eggs at different vertical heights within the plants, one egg per plant. Leaf water and nitrogen content and cuticle hardness were measured at the different plant heights. Of 92 individual larvae, 41% did not move from the node of eclosion, 49% moved upwards and 10% moved downwards with the distance moved being between zero and ten plant nodes. Larvae from eggs placed on the lower third of the plant left the natal leaf more often and moved further than larvae from eggs placed in the middle or upper thirds. The low nutritive value of leaves was the most likely explanation for more movement away from lower plant regions. Although larvae on flowering plants did not move further up or down than larvae on non-flowering plants, they more often departed the leaflet (within a leaf) where they eclosed. The final distribution of larvae was affected by plant genotype, with larvae on flowering plants found less often on leaflets and more often on stipules, tendrils and reproductive structures. Understanding intra-plant movement by herbivorous insects under natural conditions is important because such movement determines the value of economic loss to host crops. Knowing the behaviour underlying the spatial distribution of herbivores on plants will assist us to interpret field data and should lead to better informed pest management decisions.

scholarly journals Cost-Effective Binomial Sequential Sampling of Western Bean Cutworm, Striacosta albicosta (Lepidoptera: Noctuidae), Egg Masses in Corn

2011 ◽  
Vol 104 (6) ◽  
pp. 1900-1908 ◽  
Author(s):  
S. Paula-Moraes ◽  
E. C. Burkness ◽  
T. E. Hunt ◽  
R. J. Wright ◽  
G. L. Hein ◽  
...  
Keyword(s):  
Sequential Sampling ◽  
Cost Effective ◽  
Egg Masses ◽  
Western Bean Cutworm ◽  
Striacosta Albicosta ◽  
Lepidoptera Noctuidae
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