+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Rapid recovery of susceptibility under harsh environmental conditions in fenvalerate-resistant strains of the diamondback moth, Plutella xylostella (Lepidoptera : Yponomeutidae)



Rapid recovery of susceptibility under harsh environmental conditions in fenvalerate-resistant strains of the diamondback moth, Plutella xylostella (Lepidoptera : Yponomeutidae)



Applied Entomology and Zoology 41(4): 641-650



Resistance to fenvalerate was examined in a laboratory-selected population of the diamondback moth, Plutella xylostella, during exposure through 10 generations. Selection results showed that LD50 values rose from 0.003,ug per larva to 31.1 mu g per larva and 36.7 mu g per larva respectively, in replications 1 and 2 during those 10 generations. Resistant line moth eggs were significantly smaller than those of moths before selection. Therefore, we selected a subpopulation of resistant lines under harsh environmental conditions of low humidity and high temperature, over 10 generations (Harsh line) without insecticide exposure. We selected another subpopulation of resistant lines under optimal environmental conditions of high humidity and normal temperature through all 10 generations (Optimal line). After 10 generations, the LD50 of fenvalerate decreased to 0.03 mu g per larva and 0.02 mu g per larva under harsh conditions and 0.2 mu g per larva and 0.29 mu g per larva under optimal conditions. The LD50 values were lower for the Harsh lines than for the Optimal lines in all generations. The egg size of both lines increased gradually through 10 generations. Comparisons of these two lines showed that the egg size increased more rapidly in the Harsh lines than in Optimal lines in early (first-sixth) generations. In subsequent generations, egg sizes were nearly normal in both lines. Comparison of immature survivability of Harsh and Optimal lines reared under those conditions showed that the survivability of Harsh line individuals was significantly lower than for Optimal lines. Comparison of the two lines' survivability showed an opposite result from the comparison when they were reared under equivalent optimal conditions. These results suggest that susceptibility to insecticides might recover more quickly in Harsh lines than in Optimal lines because resistant insects with small eggs had lower survivability than susceptible insects with normal eggs. They were eliminated more rapidly under harsh environmental conditions.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 013008692

Download citation: RISBibTeXText

DOI: 10.1303/aez.2006.641


Related references

Diminished egg size in fenvalerate resistant strains of the diamondback moth Plutella xylostella (Lepidoptera: Yponomeutidae). Applied Entomology and Zoology 39(2): 335-341, 2004

Decreased sensitivity of central nerve to fenvalerate in the pyrethroid-resistant diamondback moth, Plutella xylostella Linne (Lepidoptera: Yponomeutidae). Applied Entomology and Zoology, 222: 176-180, 1987

Inheritance of fenvalerate resistance in the diamondback moth, Plutella xylostella Linne (Lepidoptera: Yponomeutidae). Korean Journal of Applied Entomology, 302: 106-110, 1991

Stability of fenvalerate resistance in the diamondback moth plutella xylostella linne lepidoptera yponomeutidae. Japanese Journal of Applied Entomology & Zoology 32(3): 210-214, 1988

Changes in egg size of the diamondback moth Plutella xylostella (Lepidoptera: Yponomeutidae) treated with fenvalerate at sublethal doses and viability of the eggs. Applied Entomology and Zoology 37(1): 103-109, 2002

Cuticular penetration of S-fenvalerate in fenvalerate-resistant and susceptible strains of the diamondback moth, Plutella xylostella (L.). Pesticide Biochemistry and Physiology 33(1): 83-87, 1989

Development of fenvalerate resistance in the diamondback moth plutella xylostella linne lepidoptera yponomeutidae and its cross resistance. Korean Journal of Applied Entomology 29(3): 194-200, 1990

Susceptibility of the diamondback moth, Plutella xylostella (L) (Lepidoptera: Yponomeutidae), to insecticide sprays on cabbage. Journal of Agriculture of the University of Puerto Rico 74(2): 153-166, 1990

Management of insecticide resistant populations of diamondback moth, Plutella xylostella L. (Yponomeutidae: Lepidoptera). Research on Crops 5(2/3): 261-267, 2004

Insensitivity of acetylcholinesterase in phenthoate resistant diamondback moth, Plutella xylostella L Lepidoptera Yponomeutidae. Applied Entomology and Zoology 22.1: 116-118, 1987

Management of insecticide resistant populations of diamondback moth, Plutella xylostella (L.) (Yponomeutidae: Lepidoptera). Pest Management in Horticultural Ecosystems 9(1): 33-40, 2003

Metabolism of fenitrothion in the resistant and susceptible diamondback moth, Plutella xylostella L. (Lepidoptera: Yponomeutidae). Journal of Pesticide Science 21(1): 17-21, 1996

Management of insecticide resistant diamondback moth, Plutella xylostella L. (Lepidoptera: Yponomeutidae) on cabbage using some novel insecticides. Mysore Journal of Agricultural Sciences 31(3): 230-235, 1997

Low Intrinsic Rate of Natural Increase in Bt-resistant Population of Diamondback Moth, Plutella xylostella (L.) (Lepidoptera: Yponomeutidae). Japanese journal of applied entomology and zoology 42(2): 59-64, 1998

Cross-resistance of Bacillus thuringiensis resistant population of diamondback moth Plutella xylostella (Lepidoptera: Yponomeutidae). Resistant Pest Management 9(2): 11-13, 1997