Results 41 to 50 of about 511 (174)

Phytochemical Analysis and Insecticidal Activity of Four Plant Extracts Against Maize Weevil and Larger Grain Borer

open access: yesInternational Journal of Agronomy, Volume 2026, Issue 1, 2026.
Plant‐based biopesticides provide a sustainable alternative to synthetic insecticides for managing postharvest losses caused by maize weevil (Sitophilus zeamais) and larger grain borer (Prostephanus truncatus). This study evaluated the phytochemical composition and insecticidal activity of methanolic extracts of Lantana camara, Citrus sinensis, Moringa
Samuel Yakubu Gariba   +3 more
wiley   +1 more source

Amblyseius largoensis in controlling red palm mite under semi-field conditions [PDF]

open access: yesPesquisa Agropecuária Brasileira, 2016
: The objective of this work was to evaluate the efficiency of two Amblyseius largoensis (Acari: Phytoseiidae) populations in controlling Raoiella indica (Acari: Tenuipalpidae). The treatments were: release of A. largoensis from the island of La Réunion;
Elisangela Gomes Fidelis Morais   +3 more
doaj   +2 more sources

Natural Pesticides in Crop Protection: Comparative Advantages, Ecological Risks, and Future Directions

open access: yesJournal of Chemistry, Volume 2026, Issue 1, 2026.
Although synthetic pesticides have long been used to protect crops, their widespread use has led to significant health and environmental problems, including ecological contamination, resistant pest populations, and hazardous residues in food. These restrictions have sparked interest in natural pesticides (NPs), particularly the secondary metabolites of
Ruth Mwangi   +2 more
wiley   +1 more source

Matrix spread sets of p-primitive semifield planes

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
In this article we present the matrix spread sets of the p-primitive planes of order p4 where p=3,5,7,11.
M. Cordero
doaj   +1 more source

Demographic analysis of fenpyroximate and thiacloprid exposed predatory mite Amblyseius swirskii (Acari: Phytoseiidae). [PDF]

open access: yesPLoS ONE, 2018
Knowledge of the impact of pesticides on predators is crucial for developing integrated pest management (IPM) programs. Amblyseius swirskii (Acari: Phytoseiidae) is a predatory mite used to control several species of pest including Tetranychus urticae ...
Somayyeh Ghasemzadeh, Jawwad A Qureshi
doaj   +1 more source

Brouwer’s Fixed Point Theorem and Open Mapping Theorem in Hemi‐Normed Spaces

open access: yesJournal of Mathematics, Volume 2026, Issue 1, 2026.
This paper aims for the further development of hemi‐normed spaces, which is a proper extension of normed spaces. In this regard, we establish some fundamental results of functional analysis, including Brouwer’s theorem and Schauder’s fixed point theorem for hemi‐normed spaces.
Liaqat Ali   +4 more
wiley   +1 more source

The six semifield planes associated with a semifield flock

open access: yesAdvances in Mathematics, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ball, Simeon, Brown, Matthew R.
openaire   +2 more sources

Native Bacillus Strains Crude Culture Product Exhibits High Biocidal Activities Against Larvae and Adult Anopheles Mosquitoes

open access: yesJournal of Tropical Medicine, Volume 2026, Issue 1, 2026.
Anopheles mosquitoes are major vectors of malaria, a disease that continues to cause substantial morbidity and mortality worldwide. Bacillus‐based insecticides are widely recognized as effective, environmentally friendly, and sustainable tools for mosquito control.
Tirsit Tibebu   +7 more
wiley   +1 more source

Bumble bee semi-field studies: choice and management of colonies to reduce variability in assessment endpoints

open access: yesJulius-Kühn-Archiv, 2018
The publication of the proposed EFSA risk assessment for pollinators resulted in an increasing demand for experiments with non-Apis pollinators (EFSA 2013). However, no official guideline for the standardized semifield trials exists so far.
Klein, O.   +4 more
doaj   +1 more source

Searching for semifield flocks

open access: yesDiscrete Mathematics, 2002
In the projective space \(PG(3,q)\) let \(K\) be a quadratic cone with vertex \(v\) ; a flock \(\mathcal {F}\) of \(K\) is a set of \(q\) disjoint conics partitioning \ \(K \setminus \{ v \}\). The interest in flocks is due to their links with many geometric objects. For instance a spread (i.e.
openaire   +1 more source

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