lethal and sublethal effects of endosulfan, imidacloprid and indoxacarb on first instar larvae of chrysoperla carnea (neu.: chrysopidae) under laboratory conditions
نویسندگان
چکیده
the common green lacewing is an important natural enemy used for pest control in greenhouses. it is also very common in many agricultural systems. hence, studying lethal and sublethal effects of insecticides on this predator would be useful. toxicity of endosulfan, imidacloprid and indoxacarb was assessed on 1st instar larvae of chrysoperla carnea (stephens) in laboratory. residual bioassays were carried out in glass petri dishes. the lc50 values, for endosulfan, imidacloprid and indoxacarb were estimated 251, 24.6 and 133 mg ai/l, respectively. imidacloprid was the most toxic among insecticides tested. to assess the sublethal effects, the 1st instars were treated with lc25 of each insecticide. thereafter, these effects were studied using fertility life table experiments. the analysis of variance revealed significant difference between treatments and control with respect to developmental time of the 1st instar larvae. however, no significant difference was observed among endosulfan, imidacloprid and indoxacarb treatments considering the larval developmental time. differences between treatments and control were not significant for the developmental time of the 2nd and 3rd instars, pupae, sex ratio, adult longevity, and adult fertility. the results showed that only net reproduction rate (r0) was significantly affected by treatments. the gross reproductive rate (grr), intrinsic rate of increase (rm), doubling time (dt), mean generation time (t) and finite rate of increase (î») were not affected. the highest and the lowest amounts of rm were 0.178 and 0.169 in control and indoxacarb, respectively. imidacloprid was the most toxic of the insecticides tested on the 1st instar followed by indoxacarb and endosulfan. if results similar to laboratory findings are obtained in field conditions, these insecticides might be appropriate candidates for ipm programs.
منابع مشابه
Lethal and sublethal effects of endosulfan, imidacloprid and indoxacarb on first instar larvae of Chrysoperla carnea (Neu.: Chrysopidae) under laboratory conditions
بالتوری سبز یکی از دشمنان طبیعی مهم است که در گلخانه برای کنترل آفات حشرهای استفاده شده و در اغلب سامانههای کشاورزی فعال است. بنابراین، بررسی اثرات کشندگی و زیرکشندگی حشرهکشها روی این شکارگر مفید خواهد بود. سمیت حشرهکشهای اندوسولفان، ایمیداکلوپرید و ایندوکساکارب روی لاروهای سن اول بالتوری سبزChrysoperla carnea (Stephens) در آزمایشگاه بررسی شد. از روش زیستسنجی تماس با باقیمانده در ظرو...
متن کاملComparing effects of insecticides on two green lacewings species, Chrysoperla johnsoni and Chrysoperla carnea (Neuroptera: Chrysopidae).
This study compared lethal and sublethal effects of five insecticides, chlorantraniliprole, cyantraniliprole, spinetoram, novaluron, and lambda-cyhalothrin, on adult and second instars of two green lacewing species, Chrysoperla carnea (Stephens) and Chrysoperla johnsoni Henry, Wells and Pupedis (Neuroptera: Chrysopidae) in the laboratory. Formulated pesticides were tested using concentrations e...
متن کاملthe side effects of several pesticides and plant extracts on biological parameters of green lacewing chrysoperla carnea (neuroptera: chrysopidae) after treating eggs and 3rd instar under laboratory conditions
the side effects of three pesticides, hexaflumuron, pymetrozin and spirodiclofen and four plant extractions including, calotropis procera (willd.) r. br. (asclepiadaceae), teucrium polium (labiatae), fumaria parviflora lam. (fumariaceae) and thymus vulgaris l. (labiatae) were evaluated on survival rate and reproductive parameters of chrysoperla carnea (stephens) at 26±1oc, 60±5% rh and 16:8 (l:...
متن کاملlethal and sublethal effects of imidacloprid and pirimicarb on the melon aphid, aphis gossypii glover (hemiptera: aphididae) under laboratory conditions
the toxicity of imidacloprid and pirimicarb for all stages of the melon aphid, aphis gossypii glover, were investigated under laboratory conditions (25 ± 1 oc, 65 ± 5% r.h. and a photoperiod of 16:8 (l: d) h.) using a leaf dipping method. these pesticides were very toxic for first instar nymphs of a. gossypii with lc50 values of 17 and 220.2 ppm for imidacloprid and pirimicarb, respectively. fo...
متن کاملeffects of first language on second language writing-a preliminary contrastive rhetoric study of farsi and english
to explore the idea the investingation proposed, aimed at finding whether the performances of the population of iranians students studying english in an efl context are consistent in l1 and l2 writing taks and whether there is a cross-linguistic transfer in this respect. in this regard the subjects were instructed to write four compositions-two in english and two in farsi-which consisted of an ...
15 صفحه اولinvestigation on the effects of several plant extracts and thiamethoxam on two sex life table of chrysoperla carnea (stephens) (neu.: chrysopidae) in laboratory conditions
demographic toxicology is a common method for investigation on the sub lethal effects of pesticides on natural enemies. the side effects of plant extracts from root of madder (rubia tinctorum l.), seeds of dill (aniethum graveolens l.) and seeds of galbanum (ferula gummosa boiss.) in comparision with thiamethoxam were evaluated on life table parameters of c. carnea as agonoscena pistaciae preda...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
نامه انجمن حشره شناسی ایرانجلد ۲۸، شماره ۲، صفحات ۳۷-۴۷
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023