Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "population control" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 20
Tytuł:
The occurrence of Hypera rumicis L. [Col., Curculionidae] on Rumex confertus Willd. as an interesting option for biological weed population control
Autorzy:
Piesik, D
Powiązania:
https://bibliotekanauki.pl/articles/65505.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
weed
biological control
weed population
Hypera rumicis
Curculionidae
population control
Rumex confertus
occurrence
biological agent
Opis:
Biological methods of weed control are alternative to chemical treatments. Biological techniques are used where no possibility for chemical spraying occurs. Rumex confertus Willd. is an example of a plant-eater which is potentially more important than chemical compounds. The objective of the study was to evaluate population dynamics and the development of Hypera rumicis L. (Coleoptera, Cucurlionidae) on Rumex confertus Willd. as well as to determine effects of the injuries on growth of a plant.
Chwasty są organizmami szkodliwymi, związanymi z działalnością człowieka, zatem istnieje potrzeba walki z nimi. Środki chemiczne najczęściej stosowane do walki z chwastami są często mało selektywne, skażają środowisko oraz szybko stają się nieskuteczne, ponieważ organizmy nabywają odporności. Metody biologiczne wydają się pewnym rozwiązaniem tego problemu. Spotkały się one ze szczególnym zainteresowaniem badaczy w odniesieniu do roślin zasiedlających tereny przyrzeczne. Hypera rumicis L. to gatunek mogący odegrać pewną rolę w biologicznej walce z tym chwastem, ze względu na niszczenie części generatywnej rośliny. Badania pokazały, że owad ten może być potencjalnym regulatorem populacji zachwaszczenia spowodowanego przez szczaw omszony.
Źródło:
Journal of Plant Protection Research; 2001, 41, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The occurrence of Gastroidea viridula Deg. and Gastroidea polygoni L. [Col. Chrysomelidae] on Rumex confertus Willd. as biological representatives of weed population control
Autorzy:
Piesik, D
Powiązania:
https://bibliotekanauki.pl/articles/65315.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Polygonaceae
mossy sorrel
biological control
weed population
Chrysomelidae
Rumex confertus
Gastroidea viridula
occurrence
weed control
Gastroidea polygoni
biological agent
Opis:
Weeds are harmful organisms connected with human activities; therefore there is a need for their control. Human development and mobility have caused on purpose or purely incidental introduction of plants, exotic very often, to new sites and ecosystems. A dominating method of weed control is applying chemicals. However, chemical compounds are often of low selectivity, they also contaminate the environment and become ineffective quickly because of acquired resistance of treated organisms. The control of Rumex confertus Willd. and other weeds of the genus Rumex spp. is often not possible because of economical reasons. Large areas abundant in sorrel populations would require a large sum of money invested in expensive chemical control. Biological methods of weed control look far more promising solution to this problem. Rumex confertus Willd. is a plant corresponding to criteria to qualify it as an object for biological regulation. The objective of the study was to evaluate dynamic of population and development of the insects of the genera Gastroidea spp. (Gastroidea viridula Deg. and Gastroidea polygoni L.) occurring on Rumex confertus Willd.
Chwasty są szkodliwymi organizmami, których nie można lekceważyć. Dominującym sposobem walki z nimi są metody chemiczne. Zbyt duże stosowanie chemikaliów powoduje jednak nierzadko skażenie środowiska, a także uaktywnianie się agrofagów dotąd nieszkodliwych. Pewną alternatywą w związku z tym wydaje się być wykorzystywanie do walki z niektórymi chwastami owadów. Jednym z takich chwastów, które mogą być poddane biologicznemu zwalczaniu jest Rumex confertus Willd.
Źródło:
Journal of Plant Protection Research; 2000, 40, 3-4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Genesis of Ethnically Motivated Control in Russia: Keeping Watch on the Poles in the Nineteenth Century
Autorzy:
Grigor’eva, Kseniya
Powiązania:
https://bibliotekanauki.pl/articles/1790393.pdf
Data publikacji:
2020-06-24
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
population policy
ethnically motivated control
Russian Empire
Polish question
Opis:
This paper reviews the genesis of ethnically motivated control in the nineteenth-century Russian Empire. We determined that people of Polish descent were the main target of the earliest examples of the practice of such types of control. “Watching the Poles” differed from classic police surveillance and was closer to more modern intelligence practices: an entire category of population, rather than specific individuals, were being controlled. The practice was not passive either; it involved the Imperial government’s active intrusion into the private lives of people of Polish descent. This allows us to view the Empire’s attitude toward Poles as an early example of population policy and control over the Poles as one of the tools of executing this policy in practice.
Źródło:
Polish Sociological Review; 2020, 210, 2; 199-218
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The breast-conserving surgery of women with breast cancer in Podlaskie voivodship (Poland). Population study
Autorzy:
Maslach, D.
Krzyzak, M.
Szpak, A.
Bojar, I.
Bielska-Lasota, M.
Owoc, A.
Powiązania:
https://bibliotekanauki.pl/articles/51887.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Tematy:
breast-conserving surgery
woman
breast cancer
Polska
Podlasie region
cancer control
human population
Opis:
Introduction. The results of breast cancer treatment depend mainly on better detection in mammography screening and, consequently, a higher proportion of women with early stage of the disease. They depend also on a better access to health care services and the effectiveness of oncological treatment. One of the methods of breast cancer control is a breastconserving surgery. With a proper patients’ classification for the treatment, the results of the breast-conserving surgery do not differ in relation to mastectomy. That’s why, the availability of breast-conserving surgical methods is particularly important, especially in a population in which a population screening is conducted. Objective. The analysis of the selected aspects of the breast cancer treatment’s standard in Podlaskie Voivodeship. Patients and methods. In years 2001–2002, 709 cases of women with breast cancer were reported to the Voivodeship Cancer Registry in Bialystok. 659 women were diagnosed with a primary invasive breast cancer. Based on a cohort of 499 women treated with radical methods the following indicators, recommended by WHO for the evaluation of the breastconserving surgery’s availability, were calculated: a percentage of patients with whom breast-conserving surgery was used, a proportion of breast cancer cases receiving post-operative breast radiotherapy after breast-conserving surgery and a proportion of breast-conserving surgery in pT1 cases. Results. The breast-conserving surgery has been used much less frequently in Podlaskie Voivodeship than in Western Europe, but more frequently than in Poland in general. Conclusion. It should be aimed to provide a surgical treatment with the use of breast-conserving surgical methods to the highest possible percentage of patients. The increase of the percentage of patients treated with breast-conserving surgery methods can be a result of an effective screening realisation.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategia zmian - czy zmiany strategii?
A Strategy of Change - or a Change of Strategy?
Autorzy:
Chorośnicki, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2092023.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Politycznych i Studiów Międzynarodowych
Tematy:
Security
International security
Internal security
Global strategy
National Security Strategy
Common Security and Defence Policy
Globalization
Population migration
Armed conflicts
Arms control
Bezpieczeństwo
Bezpieczeństwo międzynarodowe
Bezpieczeństwo wewnętrzne
Strategia globalna
Narodowa Strategia Bezpieczeństwa
Wspólna Polityka Bezpieczeństwa i Obrony
Globalizacja
Migracja ludności
Konflikty zbrojne
Kontrola zbrojeń
Opis:
Opracowanie analizuje etapy przemian strategii światowej w ujęciu globalnym i regionalnym. Teza o nieadekwatności działań politycznych i ekonomicznych w dzisiejszej rzeczywistości międzynarodowej jest smutna, ale prawdziwa. Punktów zapalnych w polityce światowej nie ubywa, co gorsze pojawiają się nowe (np. wyścig zbrojeń konwencjonalnych). Problemów świata w ich złożoności nie da się rozwiązać za pomocą pomysłów i narzędzi z przeszłości. Punktem centralnym strategii światowej jest bezpieczeństwo. Pozorne oddalenie groźby konfliktu światowego, który mogą poprzedzić konflikty regionalne, jest dziś niepewne. Identyfikacja i opis zagrożeń nie zastąpi konkretnych, a nade wszystko skutecznych działań. Tym większe jest więc pole działania dla analityków i znawców dzisiejszej strategii ujmowanej wielowymiarowo. (abstrakt oryginalny)
The study examines the stages in the evolution of global strategy in the global and regional dimension. The thesis on the inadequacy of political and economic activities in today's international reality is sad but true. The hotspots in world politics are not becoming less numerous, and new ones keep appearing (e.g. the conventional arms race). Given their complexity, the problems that plague the world cannot be solved using the ideas and tools of the past. The cornerstone of global strategy is security. The seemingly remote threat of a world conflict that may be preceded by regional conflicts is a bit more real today. The identification and description of threats will not suffice; specific and effective measures must be taken. This makes the work of analysts of and experts in contemporary strategy approached in a multidimensional manner even more important. (original abstract)
Źródło:
Stosunki Międzynarodowe - International Relations; 2017, 53, 2; 143-151
0209-0961
Pojawia się w:
Stosunki Międzynarodowe - International Relations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Source and significance of genetic polymorphism of selected parasitic Protozoa
Autorzy:
Majewska, A.C.
Sulima, P.
Powiązania:
https://bibliotekanauki.pl/articles/838111.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
polymorphism
control
Giardia
Trypanosoma
epidemiology
evolution
parasite population
Cryptosporidium
Protozoa
Toxoplasma
taxonomy
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solution of singular optimal control problems using the improved differential evolution algorithm
Autorzy:
Lobato, F. S.
Steffen, Jr, V.
Silva Neto, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/91654.pdf
Data publikacji:
2011
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
differential evolution algorithm
optimal control
dynamic updating
population
convergence rate
mechanical engineering
chemical engineering
Opis:
The Differential Evolution algorithm, like other evolutionary techniques, presents as main disadvantage the high number of objective function evaluations as compared with classical methods. To overcome this disadvantage, this work proposes a new strategy for the dynamic updating of the population size to reduce the number of objective function evaluations. This strategy is based on the definition of convergence rate to evaluate the homogeneity of the population in the evolutionary process. The methodology is applied to the solution of singular optimal control problems in chemical and mechanical engineering. The results demonstrated that the methodology proposed represents a promising alternative as compared with other competing strategies.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2011, 1, 3; 195-206
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Social and economic aspects of population planning policies in the People’s Republic of China
Społeczne i ekonomiczne aspekty polityki jednego dziecka w Chińskiej Republice Ludowej
Autorzy:
Zalewska, M.
Zalewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/398802.pdf
Data publikacji:
2014
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
China
one child policy
population control
demography
society
gender disparities
Chiny
polityka jednego dziecka
kontrola urodzeń
demografia
społeczeństwo
dysproporcje płciowe
Opis:
In 1979 the People’s Republic of China adopted a law introducing birth control planning, which is often known as the "one-child policy” in Western countries. The policy was created and implemented because of numerous demographic and economic problems. The paper presents the assumptions behind the introduced one-child policy, multidimensional analysis of the effects of its actions and their evaluation in the context of the economic development and demographic structure of the Chinese society. It further describes the historical and economic background of the policy and its short and long-term effects in the economic and socio-demographic areas. The analysis presented is based on the World Bank databases (for demographic data comparison), and on socio-political publications from both Western countries and mainland China. The paper strives to fully present and evaluate population planning policies implemented in the PRC.
W 1979 roku w Chińskiej Republice Ludowej przyjęto ustawę wprowadzającą kontrolę planowania urodzeń, w krajach zachodnich częściej znaną pod nazwą „polityka jednego dziecka”. Była ona odpowiedzią nowej władzy Komunistycznej Partii Chin na szereg problemów demograficznych i gospodarczych, takich jak przeludnienie, nadmierne zużycie zasobów naturalnych, niedostatek dóbr. W artykule przedstawiono założenia wprowadzonej w Chinach polityki jednego dziecka, wieloaspektową analizę jej efektów oraz ich ewaluację w kontekście ekonomicznego rozwoju i demograficznej struktury społeczeństwa chińskiego. Opisano tło historyczne i gospodarcze wprowadzonej polityki oraz jej krótko-okresowe i długookresowe skutki w kontekście gospodarczym oraz społeczno-demograficznym.
Źródło:
Ekonomia i Zarządzanie; 2014, 6, 4; 29-41
2080-9646
Pojawia się w:
Ekonomia i Zarządzanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psychosocial and Ergonomic Factors, and Their Relation to Musculoskeletal Complaints in the Swedish Workforce
Autorzy:
Wahlstedt, K.
Norback, D.
Wieslander, G.
Skoglund, L.
Runeson, R.
Powiązania:
https://bibliotekanauki.pl/articles/91158.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
gender
demands-control
iso-strain
psychosocial work environment
musculoskeletal
symptoms
ergonomic factors
national population
Opis:
A random sample of 1 000 subjects (20–65 years old) from the national population of Sweden received a questionnaire; 70% (n = 695) replied, of whom 532 were occupationally active. Female gender, working with neck and/or body bent forward, arms above shoulders, and precision work tasks were predictors of musculoskeletal symptoms. Neck, shoulder, and upper back symptoms were more common in a strained situation at work (high demands, low control) (adjusted odds ratios [adjOR] 2.76, 2.80, and 2.26, respectively). Among females, neck and shoulder symptoms were more common in an iso-strain situation (high demands, low control and low social support) (adjOR 4.43 and 3.69, respectively), and low back symptoms were more common at low social support combined with a passive work situation (adjOR 3.35). No associations were found between iso-strain model and symptoms among males. In conclusion, iso-strain work situation was associated with neck symptoms among females, even when controlling for ergonomic factors.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 3; 311-321
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities to monitoring-control of the horse-chestnut leafminer [Cameraria ohridella] with some acetal derivatives of [8E,10Z]-tetradeca-8,10-dienal
Autorzy:
Grodner, J
Jablonski, T.
Kolk, A.
Przybysz, E.
Slusarski, S.
Powiązania:
https://bibliotekanauki.pl/articles/55153.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
Cameraria ohridella
Polska
Mazovia region
attractant
mating disruption
pheromone trapping technique
population control
acetal derivative
horse chestnut leafminer
[8E,10Z]-tetradeca-8,10-dienal
Aesculus hippocastanum
population monitoring
Opis:
This paper shows possibility of utilization ether derivatives of (8E,10Z)-tetradeca-8,10-dienal [2-((7E,9Z)-trideca-7,9-dienyl)-1,3-dioxan (2) and 2-((7E,9Z)-trideca-7,9-dienyl)-4-hydroxy-6-heptyl-5-hexyl-1,3-dioxan (3)] as potential lures for monitoring of horse-chestnut leafminer population. The both propheromones were synthesized at the Institute of Industrial Organic Chemistry (IPO) and then tested in 2006/07 on field trials at several different sites on terrain of Mazovian province. Within the scope of these investigations, acetal 2 was checked at different doses (10, 100, 500 μg) by the pheromone trapping technique, and aldoxane 3 was used both in pheromone trapping (at the dose 50 μg) and mating disruption technique. The good attractiveness properties were obtained for both tested compounds. However, the dose of 2-((7E,9Z)-trideca-7,9-dienyl)-1,3-dioxan had to be a 10 times higher than dose of aldoxane for the same good activity.
Źródło:
Pestycydy; 2008, 3-4; 5-13
0208-8703
Pojawia się w:
Pestycydy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Dynamics of a Chemostat Model With Delayed Nutrient Recycling
Autorzy:
Fergola, P.
Jiang, L.
Ma, Z.
Powiązania:
https://bibliotekanauki.pl/articles/929727.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
stabilność
sterowanie populacją
chemostat model
delayed nutrient recycling
stability
uniform persistence
population control
Opis:
This paper studies the dynamics of a chemostat model with n populations competing for one nutrient which can be recycled due to decomposition of dead biomass. Several kinds of results about local and global stability of non-negative equilibria, uniform persistence and control of populations are obtained.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2000, 10, 1; 81-96
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On population dynamics with campaign on contraception as control strategy
Autorzy:
Ekhosuehi, V. U.
Chete, F. O.
Powiązania:
https://bibliotekanauki.pl/articles/2052396.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
contraception
logistic model
Malthusian model
optimal control model
population
antykoncepcja
model logistyczny
model maltuzjański
model sterowania
populacja
Opis:
This work considers a population divided into two groups according to the adoption of contraception. The campaign in favour of contraception is modelled as a bounded optimal control problem within the framework of the logistic and the Malthusian models of population dynamics. The control is the fraction of non-adopters successfully educated on contraception. The objective is to maximise the number of non-adopters successfully educated on contraception over time. The optimisation problem is solved using the Pontryagin's maximum principle and the parameters of the model are estimated using the method of least squares.
Źródło:
Journal of Mathematics and Applications; 2018, 41; 63-79
1733-6775
2300-9926
Pojawia się w:
Journal of Mathematics and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eksplozja demograficzna – zagrożenia i dylematy etyczno-prawne
The demographic explosion – risks as well as ethical and legal dilemmas
Autorzy:
Klimska, Agnieszka
Kaniewska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/470573.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
eksplozja ludnościowa
regulacja urodzeń
maltuzjanizm
neomaltuzjanizm
antymaltuzjanizm
human population explosion
birth control
Malthusianism
Neo-Malthusianism
anti- Malthusianism
Opis:
The article considers risks as well as ethical and legal dilemmas arising from the human population explosion. It presents the causes of this occurrence, its course and forecasts as to the further growth of the global population. Furthermore, it contains an analysis of birth control methods and shows a link between arguments of selected stances and inter alia economics and ecology. The human population explosion has been recognised by the authors as one of the major causes of the deepening crisis in the natural environmental balance.
Źródło:
Studia Ecologiae et Bioethicae; 2015, 13, 1; 125-143
1733-1218
Pojawia się w:
Studia Ecologiae et Bioethicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effort–reward imbalance, overcommitment and their associations with all-cause and mental disorder long-term sick leave – A case-control study of the Swedish working population
Autorzy:
Lidwall, Ulrik
Powiązania:
https://bibliotekanauki.pl/articles/2168388.pdf
Data publikacji:
2016-11-18
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
Mental Disorders
sick leave
gender
working population
case-control study
effort–reward imbalance
Opis:
Objectives To investigate if effort–reward imbalance (ERI) and overcommitment (OC) are associated with all-cause and mental disorder long-term sick leave (LS), and to identify differences in associations between genders, private versus public sector employees and socioeconomic status groups. Material and Methods The study uses a cross-sectional case-control design with a sample of 3477 persons on long-term sick leave of more than 59 days and a control group of 2078 in employment. Data on sick leave originate from social insurance registers, while data on health, working and living conditions were gathered through a survey. The binary logistic regression was used to test the multivariate associations. Results Effort–reward imbalance was associated with all-cause LS among the women (odds ratio (OR) = 1.58, 95% CI: 1.2–2.08), but not among the men. Associations for mental disorder LS were evident for both ERI and OC among both genders (ERI/OC: women OR = 2.76/2.82; men OR = 2.18/2.92). For the men these associations were driven by high effort, while for the women it was low job esteem in public sector and low job security in private sector. Among the highly educated women, ERI was strongly related to mental disorder LS (OR = 6.94, 95% CI: 3.2–15.04), while the highly educated men seemed to be strongly affected by OC for the same outcome (OR = 5.79, 95% CI: 1.48–22.57). Conclusions The study confirmed the independent roles of ERI and OC for LS, with stronger associations among the women and for mental disorders. The ERI model is a promising tool that can contribute to understanding the prevailing gender gap in sick leave and increasing sick leave due to mental disorders. Int J Occup Med Environ Health 2016;29(6):973–989
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 6; 973-989
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of wood ash, river sand, mineral oil and dry pepper (Capsicum spp) dust on the population of Sitophilus zeamais (Motschulsky, 1855) (maize weevil) in maize grain storage
Autorzy:
Adiaha, Monday
Agba, Oliver
Obio, Ekpe
Undie, Utang
Asuquo, Offiong
Powiązania:
https://bibliotekanauki.pl/articles/1112671.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Control
Hymenocardia acida
Sitophilus zeamais
Zea mays
corn
effect
food
pest
population
quality
treatment
Opis:
An experiment to evaluate the effect of wood ash, river sand, mineral oil and dry pepper (Capcium spp) dust on the population (control) of Sitophilus zeamais (Motschulsky, 1855) (Coleoptera: Curculionidae) (maize weevil) was conducted. The experiment was laid out in a Completely Randomized Design (CRD) consisting of five (5) treatments; 0g, 5g river sand, 5g dry pepper dust, 5g wood ash and 5g mineral oil. All treatment were replicated three times. Data were taken on the number of population of Sitophilus zeamais emerging from individual treatments. Herein, weight loss on grain maize was taken for S. zeamais infestation. The effect of the various treatments on maize seed with S. zeamais was not significant (P>0.05), although the highest population numbers of the weevil was recorded in the control (0g). Zero population of S. zeamais was recorded in wood ash treatment at 5g, which significantly (P<0.05) protected the grains over the control. Significant (higher) weight loss was recorded in the control since no treatment was applied. All treatments except the control indicate the potential of reducing (controlling) weevil numbers. Data obtained in these experiments reveal that wood ash, pepper dust and river sand produced the most protective/control effect on the population of the weevil over the control. Result of the study show that river sand, pepper dust, wood ash and mineral oil (vegetable oil) performed positively, and hence, exert protectant properties on maize grains.
Źródło:
World News of Natural Sciences; 2018, 18, 2; 241-251
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies