Artificial Oviposition Substrate for Infesting Sunflower with Eggs of the Sunflower Moth (Lepidoptera: Pyralidae)1

1986 ◽  
Vol 79 (2) ◽  
pp. 545-547 ◽  
Author(s):  
R. L. Wilson ◽  
S. G. McClurg
1991 ◽  
Vol 17 (7) ◽  
pp. 1399-1414 ◽  
Author(s):  
P. Zagatti ◽  
M. Renou ◽  
C. Malosse ◽  
B. Fr�rot ◽  
C. Pavis ◽  
...  

1990 ◽  
Vol 19 (5) ◽  
pp. 1639-1645 ◽  
Author(s):  
Muhammad Aslam ◽  
Gerald E. Wilde ◽  
T. L. Harvey

1986 ◽  
Vol 79 (1) ◽  
pp. 116-120 ◽  
Author(s):  
John G. Riemann ◽  
Vladimir Beregovoy ◽  
Rita L. Ruud

2020 ◽  
Vol 49 (2) ◽  
pp. 444-448
Author(s):  
Jarrad R Prasifka ◽  
Brent S Hulke

Abstract Extracts from capitate glandular trichomes (CGT) of wild and cultivated sunflowers, Helianthus spp., have repellent or toxic effects on sunflower specialists and generalist herbivores less closely associated with sunflower. Though CGT have been primarily examined for their potential to provide partial resistance to the sunflower moth, Homoeosoma electellum Hulst (Lepidoptera: Pyralidae), a floret- and seed-feeding pest, the banded sunflower moth (Cochylis hospes Walsingham [Lepidoptera: Tortricidae]) is a similar species more common in the primary sunflower-producing states of North Dakota and South Dakota. Replicated field trials using partially inbred lines with low or high CGT densities were used to evaluate possible reductions to seed damage by C. hospes larvae in 2016–2017. Results failed to support the idea that CGT are a useful defense against larvae of C. hospes; the putative plant defense of high trichome density corresponded to slightly more, rather than less, insect damage. A test of a secondary explanation, that strength of sunflower hulls could help determine patterns of seed damage among tested lines, produced similarly negative results. Though timing of bloom differed between groups of most- and least-damaged lines, prior research and pheromone-trapping data suggest differences in plant maturity also cannot adequately explain the observed results. While the specific mechanisms remain unclear, significant differences in susceptibility to C. hospes exist for cultivated sunflower and limit losses from this primary insect pest.


2019 ◽  
Vol 21 (2) ◽  
pp. 65-69 ◽  
Author(s):  
Ling Cao ◽  
Xiao Liu ◽  
Qing Zhang

Sunflowermoth Homoeosoma nebulella is the most common pest of sunflowers (Helianthus annuus L.) in China. A large outbreak involving H. nebulella was discovered in Linhe of the Mongolia Autonomous Region in 2007. Different issues related to pest management were investigated in 2007–2008. Irrigation for overwintering could promote pest outbreak in the following year. It is the safest practice to sow from mid-May to mid-June, i.e. not too early. The quantity of larvae could be reduced by the treatment with Bacillus thuringiensis. The effective pest management should include selecting proper sowing date, non-irrigation and B. thuringiensis treatment. Sex pheromone trapping as a potential control measure requires further studies.


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