Claim · model-written summary
Ocimumsa nctum and Euphorbia heterophylla were competitive weed species in maize in the North Central Province.
- Interactor
- Ocimumsa nctume1weed
- Second interactor
- Euphorbia heterophylla
Euphorbia heterophyllae1weed - Outcome
- competitive weed speciese1
Zea maysNot reportedMaterialGeneCompoundOrgan / stageTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize is the second most widely cultivated cereal in Sri Lanka”
e1“Weeds are the main biological constraint for maize production with competitive weed species including Megathyrsus maximus, Cyperus rotundus, Lantana camara, Ocimumsa nctum and Euphorbia heterophylla”
Title
Maize Cultivation and Adoption of Weed Management Technologies in Sri Lanka's North Central Province
B. Sanjeewa; L. Suriyagoda; B. Marambe Tropical Agricultural Research 2025. doi:10.4038/tar.v36i2.8934
Other claims from this paper (15)
- Observation Two main maize-based cropping systems were identified in the North Central Province: rainfed upland maize monoculture and lowland paddy-based maize monoculture.
- Observation Crop-animal integration was reported by 21% of maize respondents, with mutual benefits for both components.
- Observation About 61% of maize respondents were large-scale growers (2 to 10 ha) with mechanization.
- Observation About 68% of maize respondents were full-time maize farmers who mostly used family labour.
- Observation The net return from maize farming ranged from US$ 383 to 1,000 per ha.
- Observation Younger maize farmers were more educated than the elderly.
- Observation There was a lower tendency for the younger generation to enter maize farming.
- Observation Weeds are the main biological constraint for maize production.
- Observation Megathyrsus maximus and Cyperus rotundus were competitive weed species in maize in the North Central Province.
- Observation Large-scale maize farmers used four-wheel tractors with land preparation implements for pre-plant weed control.
- Observation Topramezone and Nicosulfuron were commonly used for post-plant weed control in maize.
- Observation Small-scale farmers relied on manual weed control methods and the same herbicides.
- Observation About 23% of respondents used tank-mixed herbicides, although successful weed control was achieved without them.
- Observation About 40% of respondents had access to herbicides not registered in Sri Lanka.
- Observation The seven-month agrochemical import ban in 2021 led to the use of smuggled agrochemical products by maize farmers.