scholarly journals Full-Season Insecticide Management Programs for the Control of Colorado Potato Beetle in Commercial Potato Production, 2018

2019 ◽  
Vol 44 (1) ◽  
Author(s):  
Benjamin Z Bradford ◽  
Scott A Chapman ◽  
Linda K Crubaugh ◽  
Russell L Groves
Keyword(s):  
Colorado Potato Beetle ◽  
Potato Production ◽  
Potato Beetle ◽  
Commercial Potato

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.

scholarly journals CONTROL OF THE COLORADO POTATO BEETLE WITH AUGMENTATIVE RELEASES OF THE STINKBUG PERILLUS BIOCULATUS

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 254e-254
Author(s):  
Conrad Cloutier
Keyword(s):  
Colorado Potato Beetle ◽  
Short Interval ◽  
Potato Production ◽  
Egg Mass ◽  
Generalist Predator ◽  
Potato Beetle ◽  
Egg Destruction ◽  
Growing Conditions ◽  
Augmentative Releases ◽  
Eggs And Larvae

Tests in experimental plots over two seasons have shown that it is possible to obtain excellent control of eggs and larvae of the Colorado potato beetle (CPB) (Leptinotarsa decemlineata) under Quebec growing conditions by augmentative releases of a generalist predator, the twospotted stinkbug P. bioculatus. The stinkbugs were mass-reared on CPB eggs and larvae in the laboratory, and were released as second or third instar nymphs at the time of peak beetle oviposition. They were introduced manually at ratios of 2-4 predators : beetle egg mass in plots comprising ≈1000 `Kennebec' potato plants. Short-interval sampling after introduction indicated good rates of establishment and survival of the released P. bioculatus nymphs. Analysis of CPB egg recruitment and mortality indicated high rates of destruction of CPB eggs by the stinkbug. Egg destruction was followed by significant predation of late-instar bugs on CPB larvae, resulting in significant reductions of CPB prepupal and adult densities, and excellent foliage protection in treated plots compared to untreated controls. The results will be discussed with reference to traits of P. bioculatus that make it a good candidate for biocontrol of the CPB, and to problems yet to be resolved before augmentative releases of the predator can be used as an integrated pest management tactic in larger scale potato production.

scholarly journals Development of Bt-cry5 Insect-resistant Potato Lines 'Spunta-G2' and 'Spunta-G3'

HortScience ◽  
2002 ◽  
Vol 37 (7) ◽  
pp. 1103-1107 ◽  
Author(s):  
D.S. Douches ◽  
W. Li ◽  
K. Zarka ◽  
J. Coombs ◽  
W. Pett ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Colorado Potato Beetle ◽  
Insect Pest ◽  
Transgenic Potato ◽  
Potato Production ◽  
The United States ◽  
Field Trials ◽  
Potato Tuber Moth ◽  
Detached Leaf ◽  
Potato Beetle

The potato tuber moth (Phthorimaea operculella Zeller) is the primary insect pest of cultivated potato (Solanum tuberosum L.) in tropical and subtropical regions, causing both foliar and tuber damage. In contrast, the Colorado potato beetle (Leptinotarsa decemlineata Say) is the most important insect pest in the northern potato production latitudes. The codon-modified Bacillus thuringiensis Bt-cry5 gene (revised nomenclature cry1IaI), specifically toxic to Lepidoptera and Coleoptera, was transformed into cultivar Spunta using an Agrobacterium vector to provide resistance to both potato tuber moth and Colorado potato beetle. The Bt-cry5 gene was placed downstream from the constitutive CaMV35S promoter. Two transgenic 'Spunta' clones, G2 and G3, produced high levels of mortality in first instars of potato tuber moth in detached-leaf bioassays (80% to 83% mortality), laboratory tuber tests (100% mortality), and field trials in Egypt (99% to 100% undamaged tubers). Reduced feeding by Colorado potato beetle first instars was also observed in detached-leaf bioassays (80% to 90% reduction). Field trials in the United States demonstrated that the horticultural performance of the two transgenic lines was comparable to 'Spunta'. These Bt-cry5 transgenic potato plants with high potato tuber moth resistance have value in integrated pest management programs.

scholarly journals Control of Resistant Colorado Potato Beetle in Early Market Potato, Big Lake, Mn, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 115-115
Author(s):  
David Noetzle ◽  
Jennifer Miller
Keyword(s):  
Colorado Potato Beetle ◽  
Block Design ◽  
Potato Field ◽  
Synthetic Materials ◽  
Potato Beetle ◽  
Commercial Potato ◽  
Row Width ◽  
Randomized Complete Block Design ◽  
The Individual ◽  
Early Market

Abstract Continued failure of most insecticides for control of CPB in the Anoka Sand Plains growing area stimulated further comparisons of biologicals, inorganics, and synthetic materials for CPB management. Soils are sands at this location. Plots were established in an irrigated commercial potato field. The individual plot consisted of 4—25 ft rows with a row width of 3 ft. Treatments were arranged in a randomized complete block design and were replicated 4 times. The grower treated all of the field, including the plots, with Thiodan and Asana XL at 1.0 lb and 0.5 lb Al/acre respectively on 8 Jul and 16 Jul. Plot treatments were applied on 25 Jun, 6 and 19 Jul using a CO2 hand sprayer with about 20 gals total material/acre and 40 psi pressure. Larval ratings and defoliation estimates were taken on 6 and 19 Jul. Vines were killed on 3 Aug and yields collected on 18 Aug. The center 2 rows of each plot were harvested for yield.

scholarly journals Control of Resistant Colorado Potato Beetle, Big Lake, Mn, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 146-146
Author(s):  
David M. Noetzel ◽  
Jennifer Miller
Keyword(s):  
Colorado Potato Beetle ◽  
Potato Field ◽  
Total Material ◽  
Potato Beetle ◽  
Commercial Potato ◽  
Field Plots ◽  
Very High

Abstract A trial was established in an irrigated commercial potato field adjacent to a commercial planting of a NatureMark NewLeafⓇ field. Plots were 4-36 inch rows by 25’ in length. Treatments were arranged in a RCB and replicated 4 times. Treatments were applied on 8 & 26 June and 8 July using a CO2 hand held sprayer. Total material per acre was approximately 20 gal applied using 40 psi. CPB populations were very high at this site and late readings are confused by non-random feeding. Yields were not taken.

scholarly journals Control of Colorado Potato Beetle, 1997A

1998 ◽  
Vol 23 (1) ◽  
pp. 127-127
Author(s):  
Craig A. Longtine ◽  
David W. Ragsdale ◽  
Edward B. Radcliffe
Keyword(s):  
Colorado Potato Beetle ◽  
Potato Field ◽  
Plant Spacing ◽  
Single Treatment ◽  
Randomized Design ◽  
Potato Beetle ◽  
Commercial Potato ◽  
Completely Randomized Design ◽  
Direct Counts ◽  
Flat Fan Nozzle

Abstract This trial was located in a non-irrigated commercial potato field near Hollandale in southern Minnesota. Plots consisted of a single treatment row 25 ft in length bordered on each side by two untreated guard rows. Plant spacing was 36 inches between rows and 12 inches between plants within rows. Treatments were replicated four times in a completely randomized design. Treatments were applied with a CO2-pressurized backpack sprayer fitted with a single Teejet 8003-E flat-fan nozzle delivering 40 gpa/acre at 35 psi. All treatments were applied on 2 Jul. Spraying conditions were windy, but winds were constant. In evaluating the treatments, direct counts of early instars (first and second) and late instars (third and fourth) were made on every plant in each plot on 3 Jul. The data were subjected to analyses of variance following log10(x +1) transformation.

scholarly journals Activity of four entomopathogenic nematode species against different developmental stages of Colorado potato beetle, Leptinotarsa decemlineata (Coleoptera, Chrysomelidae)

2009 ◽  
Vol 46 (1) ◽  
pp. 14-20 ◽  
Author(s):  
S. Trdan ◽  
M. Vidrih ◽  
L. Andjus ◽  
Ž. Laznik
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Developmental Stages ◽  
Control Method ◽  
Entomopathogenic Nematode ◽  
Nematode Species ◽  
Potato Production ◽  
Steinernema Feltiae ◽  
Potato Beetle ◽  
Different Temperatures

AbstractFour entomopathogenic nematode species (Steinernema feltiae, S. carpocapsae, Heterorhabditis bacteriophora, and H. megidis) were tested in a laboratory bioassay for the efficacy of these pathogens in controlling the larvae and adults of the Colorado potato beetle, Leptinotarsa decemlineata. The main aim of the study was to develop an efficient sustainable control method against the pest. With this we could develop a strategy of potato production with the intention of diminishing or even preventing the appearance of pest resistance to insecticides. The activity of these biological agents was assessed at three different temperatures (15, 20, and 25 °C) and three concentrations (200, 1000, and 2000 infective juveniles per individual). Mortality of three stages (young and old larvae and adults) was determined 2, 4, and 7 days after treatment. At 15 °C entomopathogenic nematodes showed the lowest efficacy against all insect stages. No significant differences in efficacy was determined at 20 and 25 °C as all nematodes caused prompt death of all stages. At all temperatures young larvae were most susceptible. However, when controlling overwintered adults for the purpose of preventing the mass appearance of Colorado potato beetle, we recommend an application of higher concentrations of S. feltiae suspension.

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