نتایج جستجو برای: percentage of larval mortality

تعداد نتایج: 21196739  

Journal: :journal of arthropod-borne diseases 0
ys lau department of biomedical science, faculty of allied health sciences universiti kebangsaan malaysia jalan raja muda abdul aziz 50300 kuala lumpur, malaysia s sulaiman department of biomedical science, faculty of allied health sciences universiti kebangsaan malaysia jalan raja muda abdul aziz 50300 kuala lumpur, malaysia h othman department of biomedical science, faculty of allied health sciences universiti kebangsaan malaysia jalan raja muda abdul aziz 50300 kuala lumpur, malaysia

background: trypsin modulating oostatic factor (tmof) terminates trypsin biosynthesis in adult and larval mos­quito gut. it will inhibit the growth and development of mosquito larvae feeding on it resulting in death by starvation. the objective of this study is to determine the effective dose of pichia-tmof and the combination of pichia-tmof with bacillus thuringiensi s ( bt) as larvicide on ae...

Journal: :Journal of Advanced Zoology 2022

This study was conducted to find out the effect of 5 periods exposure laser rays (0,15,10,5,20) minutes on phenotypic mutations Drosophila melanogaster, as well calculating percentage mortality and larval failure. The results showed that beams had significant effects in causing mutations, especially 15-minute period, which amounted 0.33 thus formed differences compared control group. also cause...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده ادبیات 1394

abstract the purpose of this study was to find out the effect of applying the principles of group-dynamic assessment (g-da) on learning of conditional structures in english by iranian efl learners at the intermediate level, which according to the formal educational system in iran, includes students who are in their second year of studying in high schools of koohdasht city. this study was a qua...

Journal: :iranian journal of public health 0
m.motabar h. ladonni m. zaim

an investigation was conducted to study the larvicidal activity of teknar (san-402-i-bacillus thuringiensis, serotype h-14, sandoz, 600 itu/mg) on mosquitolarvaein kazeroun, fars province, southern iran. five experimental plots were selected randomly in a rice field and three concentrations of teknar: .0003, .0006 and .0012 cc/1 was used. maximum larval mortality usually occurred during the fir...

Journal: :Journal of the American Mosquito Control Association 1999
J Wang

Probabilities of pyrethroid resistant genotypes in natural populations of Anopheles sinensis Wiedemann were measured with deltamethrin and permethrin. The median lethal concentrations (LC50s) of deltamethrin and permethrin in the susceptible larval population were 0.0209 and 0.1747 ppm, respectively. Under dosages that produced 99% mortality in susceptible laboratory strains of larvae, the leth...

Journal: :Environment Conservation Journal 2023

With an aim to find out effective bed disinfectant regulating disease incidence, larval growth parameters and mortality of mulberry silkworm, Bombyx mori L. revealed a positive influence on the silkworm race, (CSR6 × CSR26) (CSR2 CSR27). The commercial disinfectant, Ankush manifested better result in terms reduction incidence (1.833 %) (larval duration, 21.888 days; full grown weight, 4.596 g; ...

Journal: :iranian journal of public health 0
b. davari m.zaim m.nateghpour

survivorship of the immature stage of anopheles culicifacies in damar district were studied through sampling larval and pupal stages from stream bed pools and rice fields during may and august 1993. the duration of each larval instar and the pupal stage was also determined in the laboratory for preparing the survivorship curves and the construction of the life tables. mortality from egg to adul...

2014
Hossam El-Din M. Zahran

The effect of methanolic plant extracts from Solanum nigrum, Acokanthera spectabilis and Heliotropium aegyptiacum were investigated on the larval mortality and development of Culex pipiens L. Also, the effects of the LC50 of the three plant extracts on the larval haemogram were studied. Plant extracts exhibited variable bioactivities. The greatest activity was observed for S. nigrum which showe...

ژورنال: علوم آب و خاک 2005
بیژن حاتمی, , حسین سیدالاسلامی, , عبدالمجید رضایی, , مرجان خلیلی ماهانی, , بهرام حیدری, ,

Elm leaf beetle were reared under controlled conditions (25± 2 oC, 70± 5%R.H. and 16L: 8D) to determine relationship between biological traits and the number of eggs per female on different hosts and to evaluate correlation between traits. U. carpinifolia, U .c. var. umbraculifera, U. glabra var. pendula and Celtis caucasica were examined as hosts. The biological traits consisted of 1st, 2nd an...

بیژن حاتمی, , حسین سیدالاسلامی, , عبدالمجید رضایی, , مرجان خلیلی ماهانی, , بهرام حیدری, ,

Elm leaf beetle were reared under controlled conditions (25± 2 oC, 70± 5%R.H. and 16L: 8D) to determine relationship between biological traits and the number of eggs per female on different hosts and to evaluate correlation between traits. U. carpinifolia, U .c. var. umbraculifera, U. glabra var. pendula and Celtis caucasica were examined as hosts. The biological traits consisted of 1st, 2nd an...

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