scholarly journals Crop Rotation Reduces the Cost of Colorado Potato Beetle Control in Potatoes

1998 ◽  
Vol 8 (2) ◽  
pp. 229-234 ◽  
Author(s):  
John Speese ◽  
S.B. Sterrett
Keyword(s):  
Crop Rotation ◽  
Colorado Potato Beetle ◽  
Management Program ◽  
Economic Returns ◽  
Naturally Occurring ◽  
Potato Beetle ◽  
Insecticide Efficacy ◽  
Treatment Thresholds ◽  
Untreated Check ◽  
The Cost

The effect of crop rotation was investigated on the efficacy and the economics of various insecticide strategies for Colorado potato beetle (CPB) control in potatoes (Solanum tuberosum L.) in 1995-96. These included broad-spectrum insecticides and biorational (environmentally friendly, naturally occurring) combinations that targeted specific CPB life stages. CPB pressure was greater in the nonrotated than the rotated plots. Although all materials gave better CPB control than the check, significantly more spray applications were required to reduce CPB numbers below treatment thresholds in the nonrotated plots than the rotated plots in both years. Overall yields and economic returns were significantly greater in the rotated plots in 1995. Efficacy of insecticide strategies varied, with little defoliation and few CPB larvae found in the imidacloprid treatment in 1995 and 1996. All insecticide strategies except endosulfan resulted in significantly higher estimated returns to management than the untreated check; the greatest returns occurred with permethrin and cryolite. No yields or returns could be obtained in 1996 due to excessive rainfall before harvest. These results indicate that yield and the cost of the insecticide strategy should be considered as well as insecticide efficacy in developing an effective integrated pest management program.

Predation of Colorado Potato Beetle (Coleoptera: Chrysomelidae) Eggs and Larvae by Chrysoperla rufilabris (Neuroptera: Chrysopidae) Larvae in the Laboratory and Field Cages

1991 ◽  
Vol 26 (4) ◽  
pp. 443-449 ◽  
Author(s):  
Donald A. Nordlund ◽  
Don C. Vacek ◽  
David N. Ferro
Keyword(s):  
Colorado Potato Beetle ◽  
Cost Effective ◽  
Release Rates ◽  
Field Cage ◽  
Chrysoperla Rufilabris ◽  
Potato Beetle ◽  
Population Reduction ◽  
Important Pest ◽  
The Cost ◽  
Eggs And Larvae

Studies of predation by Chrysoperla rufilabris larvae on Colorado potato beetle (CPB), Leptinotarsa decemlineata, were conducted to determine if this predator could effectively prey on eggs and young larvae of this important pest. In laboratory experiments in which CPB eggs and young larvae were exposed to 5 or 10 C. rufilabris larvae/cage we obtained 99.7% and 97.7% population reduction, respectively. In experiments in which CPB larvae were exposed to 10 or 50 C. rufilabris larvae/cage we obtained 79.9% and 97.3% population reduction, respectively. In field cage experiments, 84% population reduction was obtained with release rates of 80,940 C. rufilabris larvae per hectare. These data indicate that C. rufilabris larvae might be useful in periodic release programs against this important agricultural pest. However, because of the high release rates required in the field, a significant reduction in the cost of mass production is needed to make C. rufilabris a cost effective agent for control of this pest.

scholarly journals Comparison of three management schemes for Colorado potato beetle on early-season potatoes in Prince Edward Island

2005 ◽  
Vol 71 (3) ◽  
pp. 121-127 ◽  
Author(s):  
J.G. Stewart ◽  
A.P. Dornan
Keyword(s):  
Bacillus Thuringiensis ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Prince Edward Island ◽  
Tuber Yield ◽  
Fourth Instar ◽  
Early Season ◽  
Potato Beetle ◽  
Untreated Check ◽  
Management Schemes

The economics of managing the Colorado potato beetle, Leptinotarsa decemlineata (Coleoptera: Chrysomelidae) on potatoes (Solarium tuberosum) with different strategies was tested at four sites on Prince-Edward-Island in 1989. Three treatments were tested at each site: 1) an untreated check, 2) an application of Bacillus thuringiensis var. tenebrionis or rotenone after a threshold of 0.5 Colorado Potato Beetle Equivalents (CPBE) per stalk was reached ( 1 CPBE = 1 spring adult, 8 first- or second- instar larvae, 3 third- or fourth- instar larvae, or 1.6 summer adults), and 3) applications of insecticide according to the grower's normal spray schedule. At one site, tuber yield of plots managed with the 0.5 CPBE-per-stalk threshold was similar to that of plots where the grower maintained his normal spray schedule, but three fewer applications of insecticides were needed in the former. At the remaining sites, where the density of Colorado potato beetles did not exceed the threshold, tuber yield was similar to that of the grower's plots. This suggests that there were needless applications of insecticides by the growers.

scholarly journals COLORADO POTATO BEETLE CONTROL WITH CYROMAZINE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 628e-628 ◽  
Author(s):  
J.D. Abbott ◽  
L. T. Thetford
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Total Yield ◽  
Insect Growth Regulator ◽  
Insect Feeding ◽  
Potato Leaf ◽  
Egg Hatch ◽  
Potato Beetle ◽  
Untreated Check ◽  
Small Plot

Cyromazine is a triazine molecule with insect growth regulator properties being developed for control of Colorado potato beetle (Leptinotarsa decemlineata Say) (CPB) in vegetables. Research presented focuses primarily on results with potato (Solanum tuberosum L.), however, crop safety has been observed in other crops within the Solanaceae. Several trials were conducted in PA and NY during 1991 to examine the rates and timing necessary to control CPB in potatoes. Data from replicated small plot trials and non-replicated large block trials are included. Rates examined ranged 70 to 560 g ai na-1 applied alone or in combination with a pyrethroid or Bt. Comparisons were made with insecticides presently registered for CPB control in potatoes and cyromazine compared quite favorably. Two applications per CPB generation were made, the first at the beginning of CPB egg hatch and a second 7-16 days later for each generation. This application schedule provided excellent (90%) control of CPB larvae. The reduction in larvae also resulted in a reduction in adult CPB and potato leaf area damaged through insect feeding. In the test conducted in PA, an increase in size and number of tubers was observed when plants were treated with cyromazine. -These increases resulted in a 23-28% increase in total yield compared to that obtained from the untreated check plots.

scholarly journals 633 Field Performance of “Transgenic” Potato, with Resistance to Colorado Potato Beetle and Viruses

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 556E-557 ◽  
Author(s):  
David R. Duncan ◽  
David Hammond ◽  
Jim Zalewski ◽  
John Cudnohufsky ◽  
Wojciech Kaniewski ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
Environmental Protection Agency ◽  
Insect Pest ◽  
Resistance Management ◽  
Field Performance ◽  
Transgenic Potato ◽  
Nutritional Composition ◽  
Management Program ◽  
Russet Burbank ◽  
Potato Beetle

After more than 10 years of research, Monsanto scientists have developed improved seed potatoes that are protected from serious pests, including insects and disease. The first commercial products resulting from this effort were NewLeaf ® potatoes derived from `Russet Burbank' and `Atlantic' parents. The NewLeaf® product was commercialized in 1995 and contains a gene from Bacillus thuringiensis (variety tenebrionis) (B.t.t.). for the production of the Cry3A protein. Potatoes expressing this gene are completely protected from the Colorado potato beetle (CPB) and need no additional chemical protection for this insect pest. The U.S. Food and Drug Administration (FDA), U.S. Dept. of Agriculture (USDA), and U.S. Environmental Protection Agency (EPA) have all determined that these potatoes are the same in safety and nutritional composition as any other `Russet Burbank' and `Atlantic' potatoes. These potatoes have also been approved by Health Canada, Agri-Food Canada and Agriculture Canada and by Japan and Mexico for food use. Commercial growers across North America have experienced outstanding performance while growing NewLeaf® potatoes 3 years in a row. This level of performance is the result of stable, nonsignificant differences in expression of the Cry3A gene. The stable performance, also, is a result of an effective insect resistance management program based on maintaining CPB refuges near NewLeaf ® fields, reducing CPB populations, and monitoring for CPB surviving exposure to NewLeaf® potatoes. In 1998 NewLeaf Y®), conferring resistance to both CPB and potato virus Y, and NewLeaf Plus®, conferring resistance to CPB and potato leafroll virus will be commercially released.

Susceptibility of Prepupae of the Colorado Potato Beetle (Coleoptera: Chrysomelidae) to Entomopathogenic Nematodes (Rhabditida: Steinernematidae, Heterorhabditidae)

1992 ◽  
Vol 27 (1) ◽  
pp. 37-43 ◽  
Author(s):  
William W. Cantelo ◽  
William R. Nickle
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Laboratory Tests ◽  
Entomopathogenic Nematodes ◽  
Parasitic Nematodes ◽  
Individual Treatment ◽  
Regression Equations ◽  
Potato Beetle ◽  
Leptinotarsa Decemlineata Say ◽  
The Cost

This research investigated the ability of five species or strains of parasitic nematodes to control the Colorado potato beetle, Leptinotarsa decemlineata (Say), when beetle prepupae were released on potting soil containing the nematodes. The nematodes tested were: Steinernema carpocapsae Weiser (All strain); S. carpocapsae (Mexican strain); S. feltiae (= bibionis) (Filipjev) (strain #27); S. feltiae (strain #980) and Heterorhabditis bacteriophora Poinar. Six dosage levels ranging from 10.3 to 329.2 nematodes/cm2, in addition to the water-only controls, were used in these laboratory tests. Each dosage-strain combination was replicated four times with 20 prepupae exposed to each individual treatment. The five strains demonstrated 100% kill at 164.6 nematodes/cm2. Except for the Mexican strain of S. carpocapsae, every strain produced over 98% mortality at 82.3 nematodes/cm2. Dosage response regression equations were calculated for each strain. Although field applications probably would require higher rates to obtain the same mortality, the use of parasitic nematodes has potential for suppressing Colorado potato beetle populations. The cost or dosage rate of nematodes may have to be reduced before the control costs would be acceptable to a grower.

MANAGEMENT OF LATE-SEASON ADULTS OF THE COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) WITH ENTOMOPATHOGENIC NEMATODES

1998 ◽  
Vol 130 (4) ◽  
pp. 509-514 ◽  
Author(s):  
Jeff G. Stewart ◽  
Gilles Boiteau ◽  
Joe Kimpinski
Keyword(s):  
New Brunswick ◽  
Colorado Potato Beetle ◽  
Prince Edward Island ◽  
Entomopathogenic Nematodes ◽  
Field Trials ◽  
Steinernema Carpocapsae ◽  
Laboratory Conditions ◽  
Potato Beetle ◽  
Untreated Check ◽  
Repeated Applications

AbstractThe susceptibility of Colorado potato beetle [Leptinotarsa decemlineata (Say), Coleoptera: Chrysomelidae] to entomopathogenic nematodes (Steinernema carpocapsae, ’All’ strain, Nematoda: Heterorhabditae) was tested in the laboratory and the field in 1992 and 1993. Under laboratory conditions, applications of 5.0 × 105S. carpocapsae per square metre to larvae, pupae, and (or) adults resulted in 100% mortality in all experimental groups. Steinernema carpocapsae persisted through the larval–pupal and pupal–adult transitions. A single application of nematodes was sufficient to control the Colorado potato beetle. The following treatments were tested at field sites in New Brunswick and Prince Edward Island: (i) untreated check, (ii) application of nematodes, or (iii) application of insecticides. Straw mulch was either present or absent in each treatment. In 1992 in New Brunswick, nematodes and fenvalerate reduced Colorado potato beetle populations by 31% compared with the untreated check. However, in 1993, differences among treatments were not significant. The results from the field trials in Prince Edward Island were variable; the life expectancy of nematodes is likely shorter in the field than under laboratory conditions. Further investigation into the benefits of repeated applications of nematodes, higher rates, or improvements in application technology are required to achieve consistent control of the Colorado potato beetle.

scholarly journals Colorado Potato Beetle Control With Foliar Sprays, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 168-169
Author(s):  
Robert L. Stoltz ◽  
Nancy A. Matteson
Keyword(s):  
Colorado Potato Beetle ◽  
Individual Treatment ◽  
Row Spacing ◽  
Silt Loam ◽  
Hollow Cone ◽  
Weekly Basis ◽  
Potato Beetle ◽  
Whole Plant ◽  
Untreated Check ◽  
Extension Center

Abstract Experimental plots were established on the UI Research and Extension Center, Kimberly, Idaho. Potatoes were planted on 25 Apr and irrigated by solid set sprinkler. The soil type was Portneuf silt loam. Six treatments and one untreated check plot were replicated four times in a RCB design. Individual treatment plots were 4 rows (36 inch row spacing) wide by 25 ft long with 5 ft alleyways separating the plots. Treatment sprays were broadcast applied using a CO2 pressurized backpack sprayer (30 psi) and delivering 20 gal finished spray per acre (four, 10X hollow cone nozzles). On a weekly basis, egg masses, small larvae (1-2 instar), large larvae (3-4instar) and adult beetles were counted, and percent defoliation estimates were made from whole plant inspections of the center 5 hills of the middle 2 plot rows. On 5 Jul a pre-count of all Colorado potato beetle (CPB) life stages was taken and all treatment applications were made. A second application of both Spinosad rates was made on 12 Jul. Data were analyzed using ANOVA and Student-Newman-Keuls multiple means comparison.

scholarly journals Identifying Resistance to the Colorado Potato Beetle (Leptinotarsa decemlineata Say) in Potato Germplasm: Review Update

2021 ◽  
Vol 3 ◽  
Author(s):  
Silvia I. Rondon ◽  
Max Feldman ◽  
A. Thompson ◽  
Tiziana Oppedisano ◽  
Govinda Shrestha
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Plant Traits ◽  
Insect Pests ◽  
Genetic Resistance ◽  
Genetic Material ◽  
Management Program ◽  
Sources Of Resistance ◽  
Potato Germplasm ◽  
Potato Beetle

Developing plant germplasm that contains genetic resistance to insect pests is a valuable component of integrated pest management programs. In the last several decades, numerous attempts have been made to identify genetic sources of resistance to Colorado potato beetle Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae). This review focuses on compiling information regarding general L. decemlineata biology, ecology, and management focusing on discussing biochemical and morphological potato (Solanum tuberosum L.) plant traits that might be responsible for providing resistance; the review ends discussing past efforts to identify genetic material and highlights promising new strategies that may improve the efficiency of evaluation and selection of resistant material. Measurement strategies, that begin with field screening of segregating populations or wild germplasm to narrow research focus can be useful. Identifying particularly resistant or susceptible germplasm, will help researchers focus on studying the mechanisms of resistance in much greater detail which will help the development of long-term sustainable management program.

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