Claim · model-written summary
None of the tested sunflower cultivars supported complete development of the beetles.
- Taxon
- Helianthus annuus
Helianthus annuuse0 - Interactor
- Zygogramma signatipennis
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Zygogramma signatipennise1biocontrol_agent - Second interactor
- Zygogramma piceicollis
Zygogramma piceicollise1biocontrol_agent - Outcome
- complete developmente0
Not reportedMaterialGeneCompoundOrgan / stageTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“some sunflower (Helianthus annuus L.) cultivars were partially utilized during host-specificity tests, none supported complete development”
e1“Zygogramma signatipennis (Stål) and Zygogramma piceicollis (Stål)”
Title
Khethani V. Mawela; David O. Simelane; Terence Olckers Insects 2022. doi:10.3390/insects13030267
Other claims from this paper (12)
- Observation The two Zygogramma beetle species, studied for biocontrol of Tithonia rotundifolia, had a short pre-oviposition period of 13-14 days.
- Observation The two Zygogramma beetle species had an incubation period of 4-5 days.
- Observation The two Zygogramma beetle species had a lifecycle of 40-45 days.
- Observation Longevity of Zygogramma signatipennis was 113 days.
- Observation Longevity of Zygogramma piceicollis was 125 days.
- Observation Fecundity of Zygogramma signatipennis was 1146 eggs per female.
- Observation Fecundity of Zygogramma piceicollis was 1133 eggs per female.
- Observation Feeding, oviposition and development of both Zygogramma species were confined within the plant tribe Heliantheae.
- Observation Both beetle species showed a very strong preference for the invasive Tithonia rotundifolia.
- Observation The only non-target species supporting development to adulthood was the exotic weed Tithonia diversifolia.
- Observation Some sunflower (Helianthus annuus) cultivars were partially utilized by the beetles in host-specificity tests.
- Recommendation The authors conclude that both Zygogramma species are suitable for release in South Africa against Tithonia rotundifolia.