scholarly journals Laboratory Evaluation of Isaria fumosorosea CCM 8367 and Steinernema feltiae Ustinov against Immature Stages of the Colorado Potato Beetle

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0152399 ◽  
Author(s):  
Hany M. Hussein ◽  
Oxana Skoková Habuštová ◽  
Vladimír Půža ◽  
Rostislav Zemek
Keyword(s):  
Colorado Potato Beetle ◽  
Steinernema Feltiae ◽  
Laboratory Evaluation ◽  
Immature Stages ◽  
Isaria Fumosorosea ◽  
Potato Beetle

scholarly journals Field Efficacy of Steinernema sp. (Rhabditida: Steinernematidae) on the Colorado Potato Beetle Overwintering Generation

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1464
Author(s):  
Maja Čačija ◽  
Renata Bažok ◽  
Majda Kolenc ◽  
Tena Bujas ◽  
Zrinka Drmić ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
First Generation ◽  
Control Measures ◽  
Recommended Dose ◽  
Steinernema Feltiae ◽  
First Year ◽  
Potato Beetle ◽  
Field Efficacy ◽  
Second Year ◽  
Economic Pest

Colorado potato beetle (CPB) is an economic pest of potato that has developed resistance to all classes of chemical insecticides, thus requiring alternative control measures. As a potential solution, entomopathogenic nematodes (EPNs) have proven effective in suppressing this pest, but their efficacy against overwintering generations of CPB in Croatia has not been sufficiently researched. The aim of this two-year (2018–2019) field study was to determine the efficacy of Steinernema feltiae and Steinernema carpocapsae applied to overwintering CPB adults. EPNs were applied at three doses (7.5 mil./10 m2, 5.0 mil./10 m2 (the recommended dose) and 2.5 mil./10 m2) by watering the soil where the adults were overwintering. The first-year results were satisfactory for both EPNs: the efficacy of S. feltiae ranged from 79.03% to 100.00%, while the efficacy of S. carpocapsae ranged from 77.32% to 96.22%. In the second year, the highest efficacy (69.57%) was obtained using the recommended dose of S. feltiae. Although the results are not consistent across the two years of our study and suggest further research, they indicate that EPNs have great potential in controlling overwintering CPB generations to reduce first generation abundance and damage, and also to prevent the spread of new generations to surrounding potato growing areas.

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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