35.053 BF729  –  Gelechiidae –  Anomologinae – Isophrictis striatella – Tansy Stem Borer – ([Denis & Schiffermüller], 1775) Adult Micro:  CAT 2 – Confusion Species –       PDF Icon – click for General Verification Guidelines  |   PDF Icon – click for Specific Verification Guidelines
Brown –  Significant Record / Very Rare / Vagrant    
Taxonomy:   Micro   >>  Gelechiidae  >> Anomologinae
Other Name/s: White-border Neb
ID Difficulty:  amber  – care required in the identification process, as confusion with similar species is likely – quality photographs required.
ID pointers: Brownish forewing with a white streak from the base to near the dorsum. A black dot in the middle at about three quarters and an angled line from costa to wing apex. Other markings can be variable.
Distribution:  (First record: 21 July 2024 at Sandiacre )  –  (Last record: 2 August 2024 at Breaston )  –  Nationally Scarce B – A new species for VC57 & Derbyshire when one was trapped overnight on 21st July 2024 at Sandiacre by Paul Buxton. A species that is localised in parts of south-east England, with isolated pockets occurring further north and west. A second record was recorded from Allestree on 26th July 2024 by Stephen Plant. Then one trapped at Breaston 2/8/2024 by Steve Thorpe. Possibly a species expanding its range into Derbyshire.
Flight Period: June /  July /  August /  –  On the wing June – August.  Moth Activity: Nocturnal   – and is attracted to light Photographed: Yes –  Photographed By: Paul Buxton, Stephen Plant  © All Rights Reserved
*** Last updated on 2 August 2025 by TD ***
Wingspan: 12mm
Food Plant: Tansy and Sneezewort.
Last Recorded Year: 2024
First Recorded Year: 2024
Last Recorded By – Steve Thorpe
Last Recorded General Area – Breaston

IMAGES BELOW:  Sandiacre – 21st July 2024 – Paul Buxton ©  /  Allestree – 26th July 2024 – Stephen Plant ©

 

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Distribution Map for Isophrictis striatella

Found 5 records
    ↳ 1 from After 2025
    ↳ 4 from 2020 - 2024
    ↳ 0 from Before 2020

If the Map Layers function fails, just refresh the page and it should be OK after. Use the +- zoom on the top left, or on a tablet, use two fingers to zoom. Remember, the last layer you ticked is the one which displays the popup information - they sit on top of each other - de-select then re-select, to see the popup values.

******* Choose ONLY one at a time, of either Monad, Tetrad or Hectad Distribution - each has it's own set of data. Also, the distribution maps cover ALL recorded data. *******

Bedrock Geology ** indirectly affects moth distribution by influencing the type of habitat and food plants available in an area. In turn, this may affect the types of moths that can thrive, or where they can most likely be found.

Land-cover * shows the variety of land-cover within the VC57 area, based on the CORINE (Coordination of Information on the Environment) forty-four thematic classes of land-cover. This will show, to a greater or lesser degree, the number and variety of moths found in different land-cover types. The UK continues to operate within the Copernicus programme, with the UK Centre for Ecology & Hydrology (UKCEH) providing Corine Land Cover (CLC) datasets for the UK and its territories.


NBN Atlas UK Distribution for – Isophrictis striatella

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Note – the NBN Atlas datasets are listed in the map below and vary in their currency (uptodateness) – however, the map does give a general indication of the moth's distribution across the UK.

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Monthly Records By Year: Isophrictis striatella
( data includes both Larvae and Adult Stages )

Monthly Counts By Year: Isophrictis striatella
( data is based on 'Adult' stage records only. )


First/Last Recorded Dates: Isophrictis striatella
Adult-only & Anything [Larvae, Pupae, Adult, Mines]

Shading shows moth presence between dates

Click the colour discs below to Select/De-select as Required

Recordings By Year: Isophrictis striatella
( All data includes both Larvae and Adult Stages )
Annual Growth Rate (AGR): Isophrictis striatella
AGR: -50%   |   Total % Change: -50%


CUSUM Analysis: Isophrictis striatella
About this chart: CUSUM (Cumulative Sum) charts track long-term trends in moth populations [ filtered by 'Adult' and 'Mine' life stages ] by showing whether each year’s counts are above or below the historical average. Even small shifts build up over time, making trends of growth, stability, or decline easier to see. CUSUM highlights trend-consistency — asking: “Across the years, have moth counts mostly stayed above or below average?”
The data sample has 24 gap year/s here (zero records) between 2000 and 2025. The moth may have been present in those gap years, but no data was available. Too many year-gaps may exaggerate or skew the chart.

Counts for the current year (2025) are pro-rated based on data available up to month 7 (July) to provide a full-year equivalent.

Purple line rises = years better than average; falls = years worse than average.
Peak (best year) Trough (worst year) Growth periods Decline periods
Population peaked around 2024, reaching above average levels. The lowest population point occurred near 2025, showing a significant decline.

What the Y-axis "Cumulative Deviation" means: Cumulative Deviation shows the running total of how each year’s moth population count differs from the long-term average. i

Hectad (10kmx10km) Coverage: Isophrictis striatella
( data includes both Larvae and Adult Stages )

Flight Periods – Indicative –vs– Recorded Data
Isophrictis striatella
( data includes Adult Stage only )

Flight Period chart – the grey hatched area above, which can cross one or more months, pictorially represents the best guess we have for this moth's flight periods [month/s]. The coloured lines represent the actual months seen in flight, from site observation records received between 2020-2025.

Records Behind the Map and Charts - Isophrictis striatella – 5 records available

Listed by Year - descending - scroll across to see all table columns

TaxonSite NameTetradYearDateCountStageSource
Isophrictis striatellaStaveley garden SYASK47H202525/07/20251adultvc57_irecords_extract
Isophrictis striatellaWoodland AveSK43R202402/08/20245adultvc57_irecords_extract
Isophrictis striatellaAllestree, DerbySK33P202401/08/20241adultvc57_irecords_extract
Isophrictis striatellaSandiacreSK43S202421/07/20241adultvc57_irecords_extract
Isophrictis striatellaAllestree, DerbySK33P202426/07/20241adultvc57_irecords_extract

 
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