نتایج جستجو برای: percentage of larval mortality

تعداد نتایج: 21196739  

Journal: :caspian journal of environmental sciences 2005
k. etebari a.r. bizhannia

the effect of fungicides on silkworm larvae was analyzed with regard to the fact that these beneficial insects are usually affected by fungicides, daily feeding on 1 and 2g/liter of carbendazim, a systemic fungicide, did not have significant effects on larval and pupal mortality. however the weight of the treated larvae showed considerable weight decrease up to 37% weight.. all the economic tra...

Alireza Sanei-Dehkordi, Azim Paksa Golsoom Rashid, Mohammad Amin Gorouhi, Moussa Soleimani-Ahmadi, Sadegh Mohammadi Azani Yaser SalimAbadi

Background: Mosquitoes are responsible for the transmission of many pathogens and parasites and consequently serious diseases in humans. Currently, application of plant derivatives has been suggested as an alternative bio-control technique for these medically important vectors. Methods: In this study the essential oil and methanol extract of Achilleaw...

Journal: :journal of sciences islamic republic of iran 0

the life history of enochrus quadripunctatus herbst was studied in the laboratory. the duration of each developmental stage, larval behavior, and preimaginal mortality rate were determined. it takes the insect a total of 43 days from hatching to reach the adult stage, with a high mortality rate in the first stadium. the mortality rate decreases as the beetle passes through the immature stages. ...

Journal: :کشاورزی (منتشر نمی شود) 0
مسعود اربابی بخش تحقیقات جانور شناسی، موسسه تحقیقات گیاهپزشکی کشور جناردان سینگ دپارتمان حشره شناسی و جانور شناسی کشاورزی، انستیتو علوم کشاورزی، دانشگاه هندوی بنارس، هندوستان

the feeding habit and developmental stages of cunaxa setriostris (hermann) on most injurious mite, tetranychus ludeni zacher was investigated in varanasi region, uttar pradesh, india. the female of c. setirostris as a dominant species of cunaxid mite completed its life cycle on t. ludeni within 27.5 ± 13.55 days having one larval followed by three nymphal stages. whereas, the male sex of the sa...

2014
MISBAH RASHID AFTAB AHMAD

Larvicidal effect of Azadirachta indica on mosquitoes has been studied in the present work. The water extracts of air dried leaves and fresh leaves separately have been used for the study. Different concentrations were made of all these extracts and twenty second instar larvae of Culex pipiens fatigans were placed in each concentration separately. Control was set up for each experiment. Mortali...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1392

the aim of the current study was to investigate the relationship among efl learners learning style preferences, use of language learning strategies, and autonomy. a total of 148 male and female learners, between the ages of 18 and 30, majoring in english literature and english translation at islamic azad university, central tehran were randomly selected. a package of three questionnaires was ad...

Journal: :Journal of nematology 2014
Raquel Campos-Herrera Carmen Gutiérrez

Entomopathogenic nematodes (EPNs) from the Heterorhabditidae and Steinernematidae families are well-known biocontrol agents against numerous insect pests. The infective juveniles (IJs) are naturally occurring in the soil and their success in locating and penetrating the host will be affected by extrinsic/intrinsic factors that modulate their foraging behavior. Characterizing key traits in the i...

ژورنال: علوم آب و خاک 2008
سیدالاسلامی, حسین, حاتمی, بیژن , خسروی, ملیحه , طالبی جهرمی, خلیل , عبادی, رحیم ,

In this study diflubenzuron as a chitin synthesis inhibitor with a dosage of 25 mg A.I/L, and Pyriproxyfen as a juvenile hormone analogue with a dosage of 0.4 mgA.I/L were incorporated in the wax diets of young and last instar larvae of greater wax moth and reared at different temperatures (25, 30, 35°C). Results showed that these compounds in comparison with control increased larval mortality....

سیدالاسلامی, حسین, حاتمی, بیژن , خسروی, ملیحه , طالبی جهرمی, خلیل , عبادی, رحیم ,

In this study diflubenzuron as a chitin synthesis inhibitor with a dosage of 25 mg A.I/L, and Pyriproxyfen as a juvenile hormone analogue with a dosage of 0.4 mgA.I/L were incorporated in the wax diets of young and last instar larvae of greater wax moth and reared at different temperatures (25, 30, 35°C). Results showed that these compounds in comparison with control increased larval mortality....

ژورنال: علمی شیلات ایران 2015
روفچایی, رودابه, فلاحی کپورچالی, مریم, پروانه مقدم, داریوش, چوبیان, فروزان,

Acipenser persicus is the most important sturgeon species in the south Caspian Sea, showing high mortality during larval culture. The aim of this study was to use the freshwater rotifer, Brachionus calyciflorus to feed A. persicus larvae to improve survival rates and enhance resistance. Three experimental treatments were used in this study Treatment 1, similar to the feeding protocol of the hat...

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