Abstract
The Colorado potato beetle (Leptinotarsa decemlineata Say) is the main and most dangerous pest of potatoes in Russia. Having wide adaptive capabilities, this species is gradually acclimatizing in the more northern regions of the territory of the Russian Federation. The Northwestern region has so far been considered an area with unfavorable conditions for the development of the Colorado potato beetle, but in a warming climate, the situation may change significantly. In the period of 2012–2023, field experiments conducted at the agroecological study area of the Menkovsky branch of the Agrophysical Research Institute (Leningrad region, Gatchina district) studied the long-term population dynamics and seasonal development of the Colorado potato beetle on potato plantings under conditions of different heat supply in the summer months. According to the research results, a rapid increase (from 0.1 to 68 % of plants at the time of «budding-flowering») in the presence of phytophage in the potato agrocenosis was revealed, due to a prolonged (2021–2023) significant increase in the sum of active temperatures during the growing season of the crop. The opposite effect was observed at low air temperature in the second and third decades of June. A decrease in heat supply in these decades below the temperature optimum led to a decrease in the average number of eggs in a clutch from 37 to 22 and a shift in the mass hatching of larvae to later periods (over 7 days) of the growing season of the crop. The seasonal dynamics of insect numbers is characterized by a sharp decrease in the density of phytophagous larvae after budding of potato plants. The determining factor in the mass development of the Colorado potato beetle in potato plantings is the high number of the insect at the initial stage of colonization of the potato field. Thus, with a multiple (3.7 times) excess of the economic threshold of harmfulness according to the criterion of the number of overwintered imago of the Colorado potato beetle in the phase of mass shoots of the crop, a high level (90–100 %) of plant damage by larvae was observed in the second half of the potato growing season.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Beetle presence in potato plantings rose from 0.1 to 68% of plants during 2021–2023 warming.
- Taxon
- potato
Solanum tuberosume0 - Interactor
- Colorado potato beetle
Leptinotarsa decemlineatat0pest - Outcome
- presence of phytophage in the potato agrocenosise0
- Direction
- rapid increasee0
- Value
- from 0.1 to 68 % of plantse0
- Qualifier
- 2021–2023e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rapid increase (from 0.1 to 68 % of plants at the time of «budding-flowering») in the presence of phytophage in the potato agrocenosis was revealed, due to a prolonged (2021–2023) significant increase in the sum of active temperatures during the growing season of the crop.”
t0“Colorado potato beetle”
Claim · model-written summary
Low June temperatures reduced average beetle eggs per clutch from 37 to 22.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- Colorado potato beetleLeptinotarsa decemlineatat0pest
- Outcome
- average number of eggs in a clutche0
- Direction
- decreasee0
- Value
- from 37 to 22e0
- Qualifier
- below the temperature optimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in heat supply in these decades below the temperature optimum led to a decrease in the average number of eggs in a clutch from 37 to 22 and a shift in the mass hatching of larvae to later periods (over 7 days) of the growing season of the crop.”
t0“Colorado potato beetle on potato plantings”
Claim · model-written summary
Low June temperatures delayed mass larval hatching by over 7 days.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- Colorado potato beetleLeptinotarsa decemlineatat0pest
- Outcome
- mass hatching of larvaee0
- Direction
- later periodse0
- Value
- over 7 dayse0
- Qualifier
- below the temperature optimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decrease in heat supply in these decades below the temperature optimum led to a decrease in the average number of eggs in a clutch from 37 to 22 and a shift in the mass hatching of larvae to later periods (over 7 days) of the growing season of the crop.”
t0“Colorado potato beetle on potato plantings”
Claim · model-written summary
Larval density fell sharply after potato budding.
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- buddinge0
- Interactor
- Colorado potato beetleLeptinotarsa decemlineatat0pest
- Outcome
- density of phytophagous larvaee0
- Direction
- sharp decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seasonal dynamics of insect numbers is characterized by a sharp decrease in the density of phytophagous larvae after budding of potato plants.”
t0“Colorado potato beetle”
Claim · model-written summary
Initial colonization abundance was identified as determining mass beetle development.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- Colorado potato beetleLeptinotarsa decemlineatae0pest
- Outcome
- mass development of the Colorado potato beetlee0
- Qualifier
- high number of the insect at the initial stage of colonizatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The determining factor in the mass development of the Colorado potato beetle in potato plantings is the high number of the insect at the initial stage of colonization of the potato field.”
t0“Colorado potato beetle on potato plantings”
Claim · model-written summary
At 3.7 times the beetle threshold, larvae damaged 90–100% of potato plants later in the season.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- Colorado potato beetleLeptinotarsa decemlineatae0pest
- Outcome
- plant damage by larvaee0
- Direction
- high levele0
- Value
- 90–100 %e0
- Qualifier
- 3.7 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a multiple (3.7 times) excess of the economic threshold of harmfulness according to the criterion of the number of overwintered imago of the Colorado potato beetle in the phase of mass shoots of the crop, a high level (90–100 %) of plant damage by larvae was observed in the second half of the potato growing season.”
t0“Colorado potato beetle on potato plantings”