OVERWINTERING DENSITIES AND SURVIVAL OF THE COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) IN AND AROUND TOMATO (SOLANACEAE) FIELDS

2000 ◽  
Vol 132 (1) ◽  
pp. 103-105 ◽  
Author(s):  
D.W.A. Hunt ◽  
C.S. Tan
Keyword(s):  
Solanum Tuberosum ◽  
New Jersey ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Soil Depth ◽  
Winter Mortality ◽  
Potato Beetle ◽  
Large Numbers ◽  
Overwintering Mortality

The Colorado potato beetle, Leptinotarsa decemlineata (Say), overwinters in the soil as a diapausing adult. Large numbers of adult beetles fly and walk from potato, Solanum tuberosum L. (Solanaceae), fields to the surrounding forested edges late in the summer (Voss and Ferro 1990). This movement can result in higher densities of diapausing adults in the soil along these edges than in potato fields (Weber and Ferro 1993). Beetles that overwinter in these woody borders show lower levels of overwintering mortality (Weber et al. 1994). Survivorship of overwintering Colorado potato beetle adults was positively correlated with soil depth for studies conducted adjacent to potato fields in New Jersey (Lashomb et al. 1984) and Massachusetts (Weber and Ferro 1993). Lashomb et al. (1984) reported that a 10-cm increase in soil depth decreased winter mortality by 32%.

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.

A Dispersal of Larvae of the Colorado Potato Beetle, Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae)

1957 ◽  
Vol 89 (12) ◽  
pp. 581-582 ◽  
Author(s):  
L. M. Cass
Keyword(s):  
Plant Resistance ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Large Scale ◽  
Potato Beetle ◽  
Large Numbers ◽  
Leptinotarsa Decemlineata Say ◽  
The One ◽  
Almost All

In July, 1952, during studies on the Colorado potato beetle, Leptinotarsa decemlineata (Say), at Merivale, Ontario, a large-scale dispersal of the larvae was observed. A field of early potatoes consisting of seven 100-foot rows, which was to be used as a source of supply of the insect for plant resistance studies, had been artifically infested on June 30 by placing an overwintered adult on each plant. The beetles laid eggs in largc numbers and by the second week of July the plants were overpopulated wit11 larvae. By July 14 the plants were stripped of foliage and the larvae were forced to feed on the stalks. On the morning of July 16 the starving larvae began to leave the plants in large numbers. Almost all left on the one day, some of them travelling considerable distances.

GROUND AND AERIAL MOVEMENT OF ADULT COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) IN A UNIVOLTINE POPULATION

1999 ◽  
Vol 131 (4) ◽  
pp. 521-538 ◽  
Author(s):  
Christine Noronha ◽  
Conrad Cloutier
Keyword(s):  
Solanum Tuberosum ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Low Frequency ◽  
The Sun ◽  
Inundative Release ◽  
Potato Beetle ◽  
Perillus Bioculatus ◽  
Movement Frequency

AbstractPitfall and screen traps were used around potato Solanum tuberosum L. (Solanaceae) plots to detect directional patterns of prediapause (two seasons) and postdiapause (one season) movement in a univoltine population of the Colorado potato beetle, Leptinotarsa decemlineata (Say), from Quebec. Prediapause beetles were sampled for diapause readiness using a feeding–digging test. In 1994, a plot left unprotected from the beetle (moderately defoliated) was monitored. In 1995, movement around a plot left unprotected from the beetle (severely defoliated) was compared to that from a plot protected (only lightly defoliated) by inundative release of the potato beetle predator Perillus bioculatus Say (Hemiptera: Pentatomidae). Movement frequency by postdiapause beetles in spring 1995 was low compared with 1994 prediapause movement, especially on the ground. Low-frequency flying persisted over several weeks of postdiapause beetle oviposition, with only a brief period of directionality. Flight movement by satiated prediapause beetles in August 1994 and 1995 was strongly directional, being oriented toward the closest forest border east of the plots, where sampling confirmed overwintering. In both years, satiated prediapause beetles also emigrated by walking, but mostly from densely populated and defoliated plots. Newly emerged (unsatiated) prediapause beetles emigrated en masse from severely defoliated plants, and did so exclusively by walking. Directional walking contrasted with directional flying in being predominantly oriented south-westward to northwestward, suggesting cueing on the sun position during warm hours of the day.

Tests of the Nematode DD 136 and an Associated Bacterium for Control of the Colorado Potato Beetle, Leptinotarsa decemlineata (Say)

1961 ◽  
Vol 93 (9) ◽  
pp. 759-763 ◽  
Author(s):  
H. E. Welch ◽  
L. J. Briand
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Galleria Mellonella ◽  
Biological Control Agent ◽  
Infective Larva ◽  
Codling Moth ◽  
The Body ◽  
Potato Beetle ◽  
Large Numbers ◽  
The Dead

Extensive trials showed that a nematode of the family Neoaplectanidae and its associated bacterium did not act as a permanent or temporary biological control agent against the Colorado potato beetle, Leptinotarsa decemlineata (Say). These trials and the causes of the failure were investigated for a number of years at Belleville; the initial test was reported by Welch (1958). The nematode, commonly known as DD 136, was discovered in codling moth larvae by Dutky and Hough (1955). It is ingested with food by the host, passes through the gut wall into he haemocoele, and releases a bacterium that multiplies rapidly and kills the host. The nematode feelds on the body contents of the dead host, passes through several generations, and eventually leaves the host as an infective larva. Dutky, and we, found that many kinds of insects can be infected by the nematode in the laboratory. It may be reared in large numbers by infecting larvae of the greater wax moth, Galleria mellonella (L.). The larvae die within 36 hours at room temperature and are then placed on wet filter papers in a trap designed to recover the nematodes that emerge from the dead hosts. Storage of the nematodes in water at 45° F. for a month or more causes no decrease in vitality or infectivity, so that large numbers may be accumulated for field trials. These sturdy animals may be applied with a mechanical sprayer at pressures of 100 psi without injury.

scholarly journals Inheritance of Leptine Production in Solanum chacoense

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 498F-499
Author(s):  
Catherine M. Ronning ◽  
Lind L. Sanford ◽  
John R. Stommel
Keyword(s):  
Molecular Markers ◽  
Solanum Tuberosum ◽  
Colorado Potato Beetle ◽  
Related Species ◽  
Leptinotarsa Decemlineata ◽  
Solanum Chacoense ◽  
Gene Model ◽  
Bulked Dna ◽  
Potato Beetle ◽  
Total Glycoalkaloids

Colorado Potato Beetle (Leptinotarsa decemlineata Say., CPB) is a destructive pest of the cultivated potato, Solanum tuberosum L. Certain glycoalkaloids in potato leaves are effective deterrents to this insect; however, in tubers these compounds can be toxic to humans. Leptines are foliar-specific glycoalkaloids produced by the related species, S. chacoense. These compounds have been shown to confer resistance to CPB. We are studying the inheritance of leptine production in segregating F1 and F2 populations derived from two S. chacoense accessions, 55-1 and 55-3, which are (respectively) high and low leptine producers. The F1 segregates 1:1 for high (>70% of total glycoalkaloids) and low (<20% of TGA) leptine content. Segregation data from the F1 and F2 populations suggest a twogene model for leptine production: a dominant repressor and a recessive inducer. Using two bulked DNA samples composed of highand low-leptine individuals from the F1 population, we are using various types of molecular markers (RAPDs, SSRs, DS-PCR, and AFLPs) to search for markers linked to leptine production. We have identified a RAPD band that appears to be closely associated with low leptine content and supports the two-gene model. The use of such a marker in a breeding program will facilitate the development of CPB resistant potato varieties.

Leaf surface compounds of the potato (Solanum tuberosum) and their influence on Colorado potato beetle (Leptinotarsa decemlineata) feeding

Chemoecology ◽  
2008 ◽  
Vol 18 (4) ◽  
pp. 205-216 ◽  
Author(s):  
Beata Szafranek ◽  
Elżbieta Synak ◽  
Danuta Waligóra ◽  
Janusz Szafranek ◽  
Jan Nawrot
Keyword(s):  
Solanum Tuberosum ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Leaf Surface ◽  
Surface Compounds ◽  
Potato Beetle
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