Resistance Potential of Colorado Potato Beetle (Coleoptera: Chrysomelidae) to Novaluron

Cutler, G. Christopher; Tolman, J. H.; Scott‐Dupree, Cynthia; Harris, C. R.

doi:10.1093/jee/98.5.1685

Cited by 26 publications

(17 citation statements)

References 35 publications

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“…Not only must compounds of interest exhibit no residual toxicity to the natural enemy, but exposure also must be minimized through ingestion of plant material. Although not systemic, foliar applied novaluron does have trans-laminar activity (Ishaaya et al, 2002) and its biological activity may persist as long as 5 weeks after application (Cutler et al, 2005b). Thus, P. maculiventris nymphs could be exposed to lethal concentrations of novaluron on plant foliage for extended periods during searches for prey and colonization (or recolonization) of treated fields.…”

Section: Discussionmentioning

confidence: 99%

Toxicity of the insect growth regulator novaluron to the non-target predatory bug Podisus maculiventris (Heteroptera: Pentatomidae)

et al. 2006

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Novaluron is a novel insect growth regulator that exhibits potent insecticidal activity against the Colorado potato beetle, Leptinotarsa decemlineata (Say). The predatory bug Podisus maculiventris (Say) is a natural enemy of the potato beetle found throughout North America, and is widely available commercially. Anticipating the use of novaluron in L. decemlineata management, we conducted laboratory experiments to determine the susceptibility of P. maculiventris to novaluron. Although there was a 2-to 3-day delay in the onset of toxic effects, second instars were susceptible by direct contact and through exposure to potato foliage treated with field rates. When P. maculiventris eggs were dipped in field rate novaluron solutions, there was no significant effect on percent hatch, but there was subsequently a sharp decrease in the ability of hatched nymphs to molt. Similarly, fifth instars actively preyed on L. decemlineata larvae dipped in field rate novaluron solutions, but were thereafter unable to molt into adults. Female P. maculiventris adults caged with L. decemlineata larvae and novaluron treated potato plants had reduced longevity compared to those caged with untreated potato plants. Further, oviposition and hatch of eggs from adults on novaluron treated plants was significantly reduced. Although novaluron has demonstrated selectivity in favor of beneficial insects in other studies, these results suggest that P. maculiventris would be adversely affected.

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Section: Discussionmentioning

confidence: 99%

Toxicity of the insect growth regulator novaluron to the non-target predatory bug Podisus maculiventris (Heteroptera: Pentatomidae)

et al. 2006

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“…Second, since the interval of secondgeneration adult emergence is more protracted than that of the first, and the biological activity of foliar applied imidacloprid persists only 5-7 days, proper timing of later season imidacloprid applications would probably be more difficult. Foliar novaluron treatments, on the other hand, are much more persistent (Cutler et al, 2005b; current study) and therefore offer more flexibility in application timing later in the season. Third, later season novaluron applications avoid problems due to inadequate coverage of new foliage, which may be encountered early in the season when potato plants grow very rapidly.…”

Section: Article In Pressmentioning

confidence: 92%

“…Fourth, effective alternation of insecticides during a season requires minimal overlap of the two pesticides within a generation to delay resistance development (Roush, 1989). Given the persistence of biological activity of novaluron on treated potato foliage is 4-5 weeks (Cutler et al, 2005b; current study), it is likely that residues of an initial novaluron application would be present during a subsequent imidacloprid treatment. Even applied alone, an early novaluron application would impose strong selection for novaluron-resistant beetles throughout much of the first generation.…”

Section: Article In Pressmentioning

confidence: 92%

“…In addition, since larval stages, which are usually more sensitive to insecticides (Hilton et al, 1998;Zhao et al, 2000) and less capable of developing resistance than adults (Roush, 1989), would be targeted with this insect growth regulator, imidacloprid-resistant populations may be controlled with novaluron. Indeed, Cutler et al (2005b) found that L. decemlineata larvae from adults previously exhibiting 91-fold resistance to imidacloprid were highly susceptible to novaluron. Furthermore, its selective properties should permit survival of natural enemies, providing an additional mortality factor and reducing reliance on insecticides.…”

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confidence: 99%

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Field efficacy of novaluron for control of Colorado potato beetle (Coleoptera: Chrysomelidae) on potato

et al. 2007

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Field trials were conducted in 2003 and 2004 to assess the effectiveness of novaluron (Rimon 10EC), a benzoylphenyl urea chitin synthesis inhibitor, for Colorado potato beetle, Leptinotarsa decemlineata (Say), management on potato. Foliar applications of novaluron did not significantly reduce numbers of L. decemlineata adults, egg masses, or first instar larvae, but second-fourth instars were greatly suppressed. Although an application rate of 12.5 g AI ha À1 provided unsatisfactory protection, rates of 25 and 50 g AI ha À1proved effective when applied 2 days after second instars were first observed on plants. These rates were much less effective when applied 2 days after observance of egg masses. At 50 g AI ha À1 , novaluron provided excellent, prolonged protection, whether applied twice a season, or once in alternation with imidacloprid. Defoliation was minimized, resulting in yields 3.8-5.2 times greater than those harvested from control plots. The results suggest that novaluron could be a valuable tool in future L. decemlineata management programs. r

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“…Along with the negative side-effects of chemical pesticides such as environmental contamination and threat to human health, there are several studies indicating the resistance of L. decemlineata to the most classes of insecticides such as organochlorine, organophosphorus, carbamate, and pyrethroid ones. [4][5][6][7] So, there is an urgent need to introduce an eco-friendly and effective method to control this pest. Plants have undergone a co-evolution with their natural enemies including insects, in which plant secondary metabolites are developed against them.…”

Section: Introductionmentioning

confidence: 99%

Colorado Potato Beetle (Leptinotarsa decemlineataSay) Control Potential of Essential Oil Isolated from IranianCymbopogon citratusStapf

2017

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− Colorado potato beetle is a most destructive insect pest of potato throughout the world. Although utilization of chemical insecticides is a main method for management of this pest, their negative side-effects such as threat to humans and the environmental pollution prompted researchers to search for natural alternatives. Recently plant essential oils with low or without side-effects against noun-targeted organisms and with high availability were considered as safe bio-pesticides. In the present study, toxicity of essential oil of Iranian lemongrass, Cymbopogon citratus Stapf, was evaluated against 3th instar larvae and adults of Colorado potato beetle by a leaf dipping method. Results displayed essential oil had notable toxicity against both larvae and adults after 24 and 48 h exposure times. Probit analysis revealed LC 50 values (lethal concentration to kill 50% of population) with 95% confidence limits were 10.32 (9.17 -11.72) and 7.76 (6.80 -8.74) µl/ml for larvae and 6.27 (4.82 -8.15) and 4.35 (3.24 -5.62) µl/ml for adults after 24 and 48 h, respectively. Based on regression analysis, a positive correlation between log concentration of essential oil and insect mortality was achieved. Results indicated C. citratus essential oil can be candidate as a natural alternative to the harmful chemical insecticides in the management of Colorado potato beetle.

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Resistance Potential of Colorado Potato Beetle (Coleoptera: Chrysomelidae) to Novaluron

Cited by 26 publications

References 35 publications

Toxicity of the insect growth regulator novaluron to the non-target predatory bug Podisus maculiventris (Heteroptera: Pentatomidae)

Toxicity of the insect growth regulator novaluron to the non-target predatory bug Podisus maculiventris (Heteroptera: Pentatomidae)

Field efficacy of novaluron for control of Colorado potato beetle (Coleoptera: Chrysomelidae) on potato

Colorado Potato Beetle (Leptinotarsa decemlineataSay) Control Potential of Essential Oil Isolated from IranianCymbopogon citratusStapf

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