Abstract
In the perspective of effective control of diseases and pests of potatoes (Solanum tuberosum), a study carried out in the Highland West Region of Cameroon permitted to evaluate the effect of aqueous extracts of Thevetiaperuviana seeds (AETPS) on the development of late blight caused byPhytophthora infestans and the population of insect pests. Two potato varieties (local (V1) and one improved variety "Cipira" (V2) were used. Five treatments: AETPS (T1), Bravo 720 fungicide (T3), Decis 5 EC insecticide (T4), mixture of the three substances (T2) and the control (T0) were tested using a double factorial system with completely randomized blocks. The evolution of the disease, insect population and tuber yield were evaluated and compared according to different treatments. The results show that a main disease identified in field and laboratory was mildew. 88 pests were collected and 9 pest families were identified. The Coccinelidae family was most represented (23, 86%). The incidence and severity of late blight in the field were respectively reduced to 22.77 and 76.05 % by the AETPS at 50 g/l, as the synthetic fungicide (T3). The number of insects decreased after treatment but remained relatively stable in control. The insecticidal power was maximum 1 h after application of the decis contrary to the AETPS of with maximum was between 24 and 48 h. The commercial yields obtained in the AETPS treatment were greater than 7.5 t/ha compared to 0 t/ha obtained in the controls (T0). Extracts of T. peruviana can therefore be used as anti-parasite substances in crop protection.
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Claims 10
Claim · model-written summary
Mildew was identified as the main disease in the potato field and laboratory samples.
- Taxon
- Solanum tuberosum L.
Solanum tuberosumt0 - Interactor
- mildewe0pathogen
- Outcome
- main disease identified in field and laboratory was mildewe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a main disease identified in field and laboratory was mildew”
t0“Solanum tuberosum L.”
Claim · model-written summary
The survey collected 88 potato pests and identified nine pest families.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Interactor
- pestse0pest
- Outcome
- pests were collected and 9 pest families were identifiede0
- Value
- 88e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“88 pests were collected and 9 pest families were identified”
t0“Solanum tuberosum L.”
Claim · model-written summary
Coccinelidae was the most represented family among collected insects at 23, 86%.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Interactor
- Coccinelidaee0pest
- Outcome
- Coccinelidae family was most representede0
- Value
- 23, 86%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Coccinelidae family was most represented (23, 86%).”
t0“Solanum tuberosum L.”
Claim · model-written summary
AETPS at 50 g/l reduced potato late blight incidence to 22.77.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- AETPS at 50 g/le0
- Interactor
- late blighte0pathogen
- Outcome
- incidencee0
- Direction
- reducede0
- Value
- 22.77e0
- Comparator
- synthetic fungicide (T3)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence and severity of late blight in the field were respectively reduced to 22.77 and 76.05 % by the AETPS at 50 g/l, as the synthetic fungicide (T3).”
t0“Solanum tuberosum L.”
Claim · model-written summary
AETPS at 50 g/l reduced potato late blight severity to 76.05 %.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- AETPS at 50 g/le0
- Interactor
- late blighte0pathogen
- Outcome
- severity of late blighte0
- Direction
- reducede0
- Value
- 76.05 %e0
- Comparator
- synthetic fungicide (T3)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence and severity of late blight in the field were respectively reduced to 22.77 and 76.05 % by the AETPS at 50 g/l, as the synthetic fungicide (T3).”
t0“Solanum tuberosum L.”
Claim · model-written summary
Insect numbers decreased after treatment while remaining relatively stable in controls.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- treatmente0
- Outcome
- number of insectse0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of insects decreased after treatment but remained relatively stable in control.”
t0“Solanum tuberosum L.”
Claim · model-written summary
Decis insecticidal power peaked one hour after application.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- decise0
- Outcome
- insecticidal powere0
- Direction
- maximume0
- Value
- 1 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The insecticidal power was maximum 1 h after application of the decis”
t0“Solanum tuberosum L.”
Claim · model-written summary
AETPS insecticidal power peaked between 24 and 48 hours.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- AETPSe0
- Outcome
- maximume0
- Direction
- maximume0
- Value
- 24 and 48 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AETPS of with maximum was between 24 and 48 h”
t0“Solanum tuberosum L.”
Claim · model-written summary
Commercial yield under AETPS exceeded 7.5 t/ha versus 0 t/ha in controls.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- AETPS treatmente0
- Outcome
- commercial yieldse0
- Direction
- greater thane0
- Value
- 7.5 t/hae0
- Qualifier
- 0 t/hae0
- Comparator
- controls (T0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The commercial yields obtained in the AETPS treatment were greater than 7.5 t/ha compared to 0 t/ha obtained in the controls (T0).”
t0“Solanum tuberosum L.”
Claim · model-written summary
The authors recommend T. peruviana extracts as anti-parasite substances in crop protection.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- Extracts of T. peruvianae0
- Outcome
- anti-parasite substances in crop protectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts of T. peruviana can therefore be used as anti-parasite substances in crop protection.”
t0“Solanum tuberosum L.”
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- no effect
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See all 70 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.