HOST UTILIZATION BY COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) IN A POTATO/WEED (SOLANUM SARRACHOIDES SENDT.) SYSTEM

1990 ◽  
Vol 122 (1) ◽  
pp. 113-121 ◽  
Author(s):  
David R. Horton ◽  
John L. Capinera
Keyword(s):  
Colorado Potato Beetle ◽  
Host Species ◽  
Leptinotarsa Decemlineata ◽  
Adult Size ◽  
Pest Population ◽  
Solanum Sarrachoides ◽  
Potato Beetle ◽  
Wild Host ◽  
Choice Tests ◽  
Late Instar

AbstractA non-pest population of Colorado potato beetle, Leptinotarsa decemlineata (Say), was monitored in the field and in the laboratory to define some cultural and host plant factors that might prompt increased use of potato by a population locally adapted to a wild host species (Solanum sarrachoides Sendt.). This study tested whether elimination of the beetle’s natural host from plots of potato would result in increased densities of beetles on potato, and examined whether beetles showed differences in performance on and in preference for S. sarrachoides or potato. In 2 years of study, egg densities on potato were higher in weed-free than weedy plots; paired preference tests in the laboratory also indicated that beetles deposited the most egg masses (92%) on S. sarrachoides. Densities of larvae and adults on potato were not affected by weed density. Growth rates of larvae were significantly faster on S. sarrachoides than on potato for both early-season (pre 7 July) and late-season (post 21 July) foliage. Survival and adult size were not affected by host species. In choice tests, late-instar larvae preferred S. sarrachoides to potato. Host preference of larvae varied with age of foliage, and S. sarrachoides became increasingly preferred later in the growing season.

scholarly journals Nitrogen Supply during Production of Tomato Transplants Affects Preference by Colorado Potato Beetle

HortScience ◽  
1994 ◽  
Vol 29 (11) ◽  
pp. 1326-1328 ◽  
Author(s):  
D.W.A. Hunt ◽  
A. Liptay ◽  
C.F. Drury
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Leaf Tissue ◽  
Nitrogen Supply ◽  
Host Plant Selection ◽  
Plant Selection ◽  
Greenhouse Production ◽  
Potato Beetle ◽  
Choice Tests ◽  
Spring Temperatures

Host plant selection by Colorado potato beetle [Leptinotarsa decemlineata (Say)] was examined on tomato [Lycopersicon esculentum Mill.] transplants fertilized with varying N, P, and K concentrations during greenhouse production. In choice tests conducted with beetles in the field and the greenhouse, the insect preference for plants increased with increasing leaf tissue N concentration, but P and K concentrations had no effect. Five-day, seedling acclimatization to outdoor spring temperatures before planting reduced the insect preference for plants.

scholarly journals Effect of two neem-derived pesticides on Colorado potato beetle (Leptinotarsa decemlineata Say) (Coleoptera: Chrysomelidae) under laboratory conditions

2020 ◽  
Vol 7 (2) ◽  
pp. 5-13
Author(s):  
Pratik Doshi ◽  
Ferenc Tóth ◽  
György Turóczi
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Choice Test ◽  
Feeding Damage ◽  
Potato Beetle ◽  
Time Period ◽  
Significant Difference ◽  
Choice Tests ◽  
Leptinotarsa Decemlineata Say ◽  
Neem Leaf Extract

Mortality and antifeedant activity of two different neem-derived pesticides were investigated on larvae of Colorado potato beetle (Leptinotarsa decemlineata Say). In no-choice tests, mortality of larvae increased with increase in time period, meanwhile the feeding damage decreased with the increase of neem leaf extract concentration in contrast to NeemAzal T/S (1% azadirachtin) in which neither there was any significant difference in mortality nor on feeding damage. In the choice test, none of the treatments were lethal to the larvae tested. The larvae fed on the leaves irrespective of the treatment.

SEASONAL AND HOST PLANT EFFECTS ON PARASITISM OF COLORADO POTATO BEETLE BY MYIOPHARUS DORYPHORAE (RILEY) (DIPTERA: TACHINIDAE)

1987 ◽  
Vol 119 (7-8) ◽  
pp. 729-734 ◽  
Author(s):  
David R. Horton ◽  
John L. Capinera
Keyword(s):  
Host Plant ◽  
Colorado Potato Beetle ◽  
Host Species ◽  
Complete Development ◽  
Potato Beetle ◽  
Parasitism Rates ◽  
Wild Host ◽  
Plant Effects ◽  
June July ◽  
Myiopharus Doryphorae

AbstractParasitism of Colorado potato beetle, Leptirwtarsa decemlineata (Say), by the tachinid fly Myiopharus doryphorae (Riley) was monitored over four summers. Beetle larvae were collected from potato and a wild host species, Solanum sarrachoides Sendt., and allowed to complete development in the laboratory. Parasitism rates were high, averaging 67, 58, and 45% over the 4 years, in June, July, and August, respectively. Categorical analyses indicated that parasitism rates were dependent upon year, month, and host plant species of the beetle. During 1983–1985, rates were highest in June, and decreased over the summer; results for 1986 were somewhat atypical, with parasitism rates being low in June and increasing somewhat in August. Host plant effects on parasitism varied with year. During 1983–1984, rates were higher for beetles collected from potato than beetles collected from S. sarrachoides; this tendency was reversed in 1985.

scholarly journals AFLP-Based Genetic Linkage Map of the Colorado Potato Beetle Leptinotarsa decemlineata: Sex Chromosomes and a Pyrethroid-Resistance Candidate Gene

Genetics ◽  
2001 ◽  
Vol 158 (2) ◽  
pp. 695-700 ◽  
Author(s):  
David J Hawthorne
Keyword(s):  
Candidate Gene ◽  
Linkage Map ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Sex Chromosome ◽  
Pyrethroid Resistance ◽  
Codominant Markers ◽  
Potato Beetle

Abstract A genetic linkage map was constructed from an intraspecific cross of the Colorado potato beetle, Leptinotarsa decemlineata. This is an initial step toward mapping the loci that underlie important phenotypes associated with insect adaptation to an agroecosystem. The map was made with 172 AFLP and 10 anonymous codominant markers segregating among 74 backcross (BC1) individuals. Markers were mapped to 18 linkage groups and a subset of the markers with a mean intermarker distance of 11.1 cM is presented. A pyrethroid-resistance candidate gene, LdVssc1, was placed onto the map as well. The sex chromosome was identified by exploiting the XO nature of sex determination in this species using patterns of variation at LdVssc1 and the codominant markers.

Population-associated heterogeneity of the digestive Cys protease complement in Colorado potato beetle, Leptinotarsa decemlineata

2018 ◽  
Vol 106 ◽  
pp. 125-133 ◽  
Author(s):  
Asieh Rasoolizadeh ◽  
Marie-Claire Goulet ◽  
Jean-Frédéric Guay ◽  
Conrad Cloutier ◽  
Dominique Michaud
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Potato Beetle

scholarly journals Damage potential and phenology of the Colorado potato beetle [Coleoptera: Chrysomelidae] on potato in southern Alberta

2005 ◽  
Vol 83 (2) ◽  
pp. 89-98 ◽  
Author(s):  
C. Noronha ◽  
G.M. Duke ◽  
M.S. Goettel
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Potato Production ◽  
Maximum Density ◽  
The Other ◽  
Damage Potential ◽  
Potato Beetle ◽  
Southern Alberta ◽  
Overwintering Mortality ◽  
Experimental Plots

The phenology and damage potential of the Colorado potato beetle (Leptinotarsa decemlineata) were studied in the potato producing area in southern Alberta. Experimental plots were established at Lethbridge in 1998, 1999 and 2000, and at Vauxhall in 1998 and 1999. At each site, one plot was protected against the beetle by application of insecticides while the other was "unprotected." Natural potato beetle populations quickly colonized unprotected plots each year. Overwintered adults appeared in plots by mid June with mean densities reaching between 0.3 and 0.6 per plant. Eggs were laid on young plants with mean densities reaching two egg masses per plant by late June. Maximum larval densities reached 9.5 per plant for each of 1st, 2nd and 3rd instars and 14 per plant for 4th instars. Maximum density for newly emerged adults was 57 per plant in mid-July at the 2000 Lethbridge unprotected plot. Defoliation was very low at the beginning of the season but increased sharply when 3rd and 4th instar populations peaked and continued to rise as new adults emerged. Maximum defoliation occurred at the Lethbridge plot in 2000 with 100% defoliation by 10 August. Total yields in all unprotected plots ranged from 10 to 40% lower than in the protected plots. Mean density of overwintering adults within potato plots was 76 beetles m-2 with a maximum of 232 m-2. Mean overwintering mortality was 22% and mean depth of overwintering adults was 12 cm, with 63% of the beetles collected at depths ≤ 10 cm. Our results indicate that the phenology of the beetle is similar to that reported in areas where population buildups were rapid and devastating soon after insecticide resistant populations appeared. Consequently the beetle must be considered as a serious threat to potato production in southern Alberta.

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