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residual effect of Fipronil in Eriocheir sinensis

Agricultural Biotechnology 2020年第4期9卷 140-143页

作者： Xi CHEN Cong ZHANG Chao SONG Longxiang FANG Xinyue DONG Jiazhang CHEN Freshwater Fisheries Research Center Chinese Academy of Fishery SciencesWuxi 214081China Laboratory of Quality&Safety Risk Assessment for Aquatic Products on Environmental Factors(Wuxi) Ministry of Agriculture and Rural AffairsWuxi 214081China Key Laboratory of Control of Quality and Safety for Aquatic Products Ministry of Agriculture and Rural AffairsBeijing 100000China Wuxi Fisheries College Nanjing Agricultural UniversityWuxi 214081China

The residual effects of fipronil aqueous solutions(at mass concentrations of 10,30 and 50μg/L,respectively)on Eriocheir sinensis were investigated by the semi-static experiment *** results showed that among the treatment groups with different mass concentrations,the high mass concentration group contained fipronil at a significantly higher content in the crab legs than the low-mass concentration group,and also a significantly higher content in the body than the low mass concentration *** were no significant differences in the content of fipronil between different parts of *** trend of fipronil-enriched parts was from the legs to the body to the *** residue in *** had no sex selectivity,but it enriched faster in female *** than *** study provides a certain reference for dealing with related fishery pollution accidents.

关键词： Fipronil Eriocheir sinensis residual effect

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residual effects of tobacco biochar along with different fixing agents on stabilization of trace elements in multi-metal contaminated soils

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Journal of Environmental Sciences 2020年第1期32卷 299-309页

作者： Altaf Hussain Lahori Monika Mierzwa-Hersztek Muhammad Rashid Shahmir Ali Kalhoro Mehrunisa Memon Zobia Naheed Muneer Ahmed Zengqiang Zhang College of Natural Resources and Environment Northwest A&F UniversityYanglingShannxi 712100China Department of Environmental Sciences Sindh Madressatul Islam UniversityKarachiPakistan Department of Agricultural and Environmental Chemistry University of Agriculture in KrakowalMickieivicza 2131-120KrakowPoland Faculty of Agriculture Lasbela University of AgricultureWater and Marine SciencesUthal 90150Pakistan Department of Soil Science Sindh Agriculture UniversityTandojamPakistan Agriculture Research Station BaffaMansehraKhyber PakhtunkhwaPakistan

The residual effect of tobacco biochar(TB≥500°C)mono and co-application with Cahydroxide(CH),Ca-bentonite(CB)and natural zeolite(NZ)on the bio-availability of trace elements TE(s)in alkaline soils has not been deeply studied yet.A pot study that had earlier been investigated TB mono and blended with CH,CB and NZ on the immobilization of Pb,Cu Cd,and Zn by Chinese *** crop in the rotation was selected as test plant to assess the residual impact of amendments on stabilization of Pb,Cu Cd,and Zn in mine polluted(M-P),smelter heavily and low polluted(S-HP and S-LP,respectively)*** obtained results showed that stabilization of Pb,Cd,Cu and Zn reached 63.84% with TB+CB,61.19% with TB+CH,83.31% with TB+CH and 35.27% with TB+CH for M-P soil,36.46% with TB+NZ,38.46% with TB+NZ,19.40% with TB+CH and 62.43% with TB+CH for S-LP soil,52.94%TB+NZ,57.65% with TB+NZ,52.94% with TB+NZ,and 28.44% with TB+CH for S-LP ***,TB+CH and TB alone had mobilized Pb and Zn up to19.29% and 34.96% in M-P *** mobility of Zn reached 8.38% with TB+CB and 66.03% with TB for S-HP and S-LP *** uptake and accumulation of Pb,Cd,Cu and Zn in shoot and root were reduced in three polluted ***,the combination of TB along with CH,CB and NZ has been proven to be effective in Pb,Cd,Cu and Zn polluted mine/smelter soils restoration.

关键词： Tobacco biochar residual effect Trace elements stabilization Maize Soil remediation

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residual effects of TMOF-Bti formulations against 1^(st) instar Aedes aegypti Linnaeus larvae outside laboratory

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Asian Pacific Journal of Tropical Biomedicine 2012年第4期2卷 315-319页

作者： Saiful AN Lau MS Sulaiman S Hidayatulfathi O Biomedical Science Programme Faculty of Health ScienceUniversiti Kebangsaan MalaysiaKampus Kuala LumpurJalan Raja Muda Abdul Aziz

Objective:To evaluate the effectiveness and residual effects of trypsin modulating ecstatic factor-Bacillus thuringiensis israeliensis(TMOF-Bti) formulations against Aedes aegypti(Ae. aegypti)(L) larvae at UKM Campus Kuala ***:Twenty first instar *** larvae were added in each bucket containing 4 L of water supplied with crushed dried-leaf powder as their source of *** of TMOF-Bti in rice husk formulation with the following weights viz 10,25,50 and 100 mg,respectively in duplicate was distributed in the buckets;while TMOF-Bti in wettable powder formulation each weighing viz 2,5,10 and 20 mg,respectively in duplicate was also placed in the *** control buckets run in duplicate with 4 L of water and 20 first instar *** *** buckets were covered with mosquito *** mortality was recorded after 24 hours and weekly for five weeks.A new batch of 20 1^(st) instar larvae *** was introduced into each bucket weekly without additional TMOF-Bti rice husk formulation or wettable *** experiment was repeated for four ***:The result of the study showed that all formulations were very effective on the first two weeks by giving 100% larval mortality for all concentrations *** TMOF(2%) + Bti(2%) had a good residual effect until the end of 3^(rd) week,TMOF(4%) + Bti(4%) until 4^(th) week,wettable powder TMOF(20%) + Bti(20%) until the third ***:From the results it can be concluded that the TMOF-Bti formulations can be utilized in dengue vector control.

关键词： TMOF-Bti formulations 1^(st) instar Aedes aegypti Outside laboratory residual effect Larvae Dengue Dengue vector control Mosquito Larval mortality

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Water and sediment quality parameters in the Chalan Beel, the largest wetland of Bangladesh

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Chinese Journal of Oceanology and Limnology 2015年第4期33卷 895-904页

作者： SAYEED Md.Abu HOSSAIN Mostafa Ali Reza WAHAB Md.Abdul HASAN Md.Tawheed SIMON Kumar Das MAZUMDER Sabuj Kanti Faculty of Fisheries Sylhet Agricultural University Faculty of Fisheries Bangladesh Agricultural University School of Environmental and Natural Resource Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia Marine Ecosystem Research Center Faculty of Science and Technology Universiti Kebangsaan Malaysia

A study was conducted to investigate the status of the water and sediment quality in the Chalan Beel——a major fresh water fish reservoir of the country for a period of one year from July 2007 to June 2008. The mean values of water quality parameters(depth: 214.73±152.22 cm, temperature 27.68±4.26℃, transparency 123±82 cm, p H 9.7±0.47, total alkalinity 137±42 mg/L, conductivity 307±147 μs/cm, total dissolved solids 183±89 mg/L, ammonia-N 0.27±0.39 mg/L, nitrate-N 0.09±0.07 mg/L, phosphate-P 2.01±2.53 mg/L) and sediment quality parameters(p H 7.21±0.35, organic matter 2.59±0.52%, total nitrogen 0.09±0.04%, available phosphorus 5.4±3.6 Meq./100 g and exchangeable potassium 0.43±0.14 Meq./100 g) were within the range recommended for most of the inland fishes of Bangladesh. Although the water and sediment quality parameters except ammonia and phosphate are in the suitable range, the overall results suggest that better management techniques should be practiced in order to overcome the declining trend of associated aquatic life(fauna and flora) of this important fresh water body of Bangladesh.

关键词： Chalan Beel total dissolve solids transparency residual effect organic matter sustainable management

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effects of improved fallow with Sesbania sesban on maize productivity and Striga hermonthica infestation in Western Kenya

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Journal of Forestry Research 2010年第3期21卷 379-386,400页

作者： Hans Sjogren Keith D Shepherd Anders Karlsson Department of Forest Ecology and Management Swedish University of Agricultural Sciences World Agroforestry Centre (ICRAF)

Striga hermonthica is a major constraint to smallholder sub-sistence agriculture production in the sub-Saharan African region. Low soil fertility and overall environmental degradation has contributed to the build-up of the parasitic weed infestation. Improved cropping systems have to be introduced to address the interrelated problems of S. her-monthica and soil fertility decline. Thus, the effects of improved fallow with leguminous shrub Sesbania sesban on maize yields and levels of S. hermonthica infestation on farm land in the bimodal highlands of western Kenya were investigated. The experimental treatments were arranged in a phased entry, and randomized complete block scheme were six months Sesbania fallow, 18 months Sesbania fallow, six months natural fallow consisting of regrowth of natural vegetation without cultivation, 18 months natural fallow, continuous maize cropping without fertilizer application, and continuous maize cropping with P and N fertilization. Results show that Sesbania fallows significantly （p0.05） increase maize yield relative to continuous unfertilized maize. S. hermonthica plant populations decrease in continuous maize between the first season （mean = 428 000 ± 63 000 ha-1） and second season （mean=51 000 ± 15 000 ha-1）, presumably in response to good weed management. S. hermonthica seed populations in the soil decrease throughout the duration of the experi-ment in the continuous maize treatments. Short-duration Sesbania fal-lows can provide modest yield improvements relative to continuous unfertilized maize, but short-duration weedy fallows are ineffective. Continuous maize cultivation with good weed control may provide more effective S. hermonthica control than fallowing.

关键词： agroforestry crop yield improved fallow residual effect root parasite soil fertility replenishment

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Enhanced Growth and Yield Performance of Cassava Peel Compost and Mineral Fertilizer on Corchorus olitorius L.

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Journal of Agricultural Science and Technology(B) 2014年第3期4卷 188-194页

作者： Ibidunni Temitope Okesiji Amudalat Bolanle Olaniyan James Alabi Adediran Adeniyi Olumuyiwa Togun Forestry Research Institute of Nigeria Ibadan Nigeria Department of Agronomy University of lbadan Nigeria Institute of Agricultural Research and Training Ibadan Nigeria Department of Crop Protection and Environmental Biology University of Ibadan Nigeria

Application of inorganic fertilizers improves crop yields but costs and adverse health effects often discourage their applications. This study therefore aims at evaluating the combined effects of cassava peel compost with poultry manure and mineral fertilizer on growth and yields of Corchorus olitorius. Pots （factorial laid out in a randomized complete block design） and field （split-plot with fertilizer being the main effect and the varieties the sub plot effect） experiments were carried out during rainy season at Ibadan, Nigeria. Treatments consisted of 0, 5, l0 and 20 t/ha composts prepared from cassava peel and poultry manure in ratio 3：1 and mineral fertilizer （NPK 15：15：15） at the rate of 250 kg/ha, using two varieties of C. olitorius. Five and six weeks after planting （WAP）, plants were assessed for growth and yields in pot and field experiments respectively, and also in residual studies. Application of compost significantly improved growth （heights）（36.50-41.56 cm）, while morphological and dry weight values increased with increase in compost. Marketable yield increase of 13.2%, 22.3%, 32.1% and 29.3% were recorded using 5, 10, 20 t/ha compost and NPK fertilizer respectively in the field. Corresponding increase when ratooned were 40.0%, 42.9%, 57.1% and 52.0%, respectively. Application of compost at the rate of 20 t/ha performed better in the main and residual effect experiments compared to NPK fertilizer and other compost rates. Application of cassavas peels compost at the rate of 20 t/ha proved to be adequate for optimum growth and yield performance of C. olitorius.

关键词： Corchorus olitorius compost mineral fertilizer residual effect yield.

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