Alternative Control Strategies for Coal Flotation

1985 ◽  
Vol 2 (1) ◽  
pp. 1-9
Author(s):  
J. A. Herbst ◽  
O. A. Bascur
Keyword(s):  
Control Strategies ◽  
Alternative Control ◽  
Coal Flotation

Control Strategies for Coal Flotation Circuits

1985 ◽  
Vol 18 (6) ◽  
pp. 241-246
Author(s):  
R.A. Seitz ◽  
S.K. Kawatra
Keyword(s):  
Control Strategies ◽  
Coal Flotation

scholarly journals Estimating the Optimal Control of Zoonotic Visceral Leishmaniasis by the Use of a Mathematical Model

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Laila Massad Ribas ◽  
Vera Lucia Zaher ◽  
Helio Junji Shimozako ◽  
Eduardo Massad
Keyword(s):  
Mathematical Model ◽  
Optimal Control ◽  
Visceral Leishmaniasis ◽  
Vector Control ◽  
Control Strategy ◽  
Control Strategies ◽  
Effective Control ◽  
Alternative Control ◽  
Alternative Strategies ◽  
Zoonotic Visceral Leishmaniasis

We argue that the strategy of culling infected dogs is not the most efficient way to control zoonotic visceral leishmaniasis (ZVL) and that, in the presence of alternative control strategies with better potential results, official programs of compulsory culling adopted by some countries are inefficient and unethical. We base our arguments on a mathematical model for the study of control strategies against ZVL, which allows the comparison of the efficacies of 5, alternative strategies. We demonstrate that the culling program, previously questioned on both theoretical and practical grounds is the less effective control strategy. In addition, we show that vector control and the use of insecticide-impregnated dog collars are, by far, more efficient at reducing the prevalence of ZVL in humans.

scholarly journals Comparative efficacy of mass trapping and attract-and-kill technique in the control of medfly (Ceratitis capitata, Wiedemann) in Central Moroccan peach orchards

2018 ◽  
Vol 33 (1) ◽  
pp. 53-63
Author(s):  
Adil Asfers ◽  
Abdelmalek Joutei ◽  
Ahmed Boughdad ◽  
Abdelali Blenzar ◽  
Rachid Lahlali ◽  
...  
Keyword(s):  
Ceratitis Capitata ◽  
Ammonium Acetate ◽  
Control Strategies ◽  
Mass Trapping ◽  
Comparative Efficacy ◽  
Alternative Control ◽  
Crop Season ◽  
Peach Fruit ◽  
Attract And Kill ◽  
Trapping Trials

To develop eco-friendly alternative control strategies for medfly, mass trapping trials were conducted in the central Morocco during the crop season 2016. Two control methods, mass trapping and the attract-and-kill technique were compared for the control of medfly on two peach varieties (?Rome Star? and ?Ryan Sun?) in Sefou district. For mass trapping, 62 traps/1.23 ha of MagnetTMMed type baited with ammonium acetate, trimethylamine, putrescine and 0.01 g of deltamethrin were installed on both varieties. In plots testing the attract-and-kill technique, treatments with malathion in mixture with protein hydrolyzate were applied to straw tufts attached to branches of the same varieties whenever 1 fly was caught on a Trimedlure trap installed at the center of each plot. The results showed that the number of flies captured by mass trapping reached 508 and 489 adults on ?Rome Star? and ?Ryan Sun?, respectively. The average number varied from 1 to 3 adults/trap/day, depending on the date of capture and the variety, and females accounted for 62-100% of total caught flies. In plots protected by the attract-and-kill technique, and taking into account the threshold adopted by the farm, 11 and 15 treatments were carried out respectively on the ?Ryan Sun? and ?Rome Star? varieties. Overall, infestation rates in plots did not exceed 0.3% before or at harvest with mass trapping versus 0.9% with the attract-and-kill technique. On fruit dropped on the ground, the infestation rate did not exceed 4% in mass trapping, compared to 11.5% in the chemically treated plots. Mass trapping was therefore proved to be an effective and eco-friendly tool for managing medfly on peach fruit.

Gene characterization of two digestive serine proteases in Sitodiplosis mosellana: implications for alternative control strategies

2010 ◽  
Vol 142 (6) ◽  
pp. 532-545
Author(s):  
Lourdes D. Arrueta ◽  
Richard H. Shukle ◽  
Ian L. Wise ◽  
Omprakash Mittapalli
Keyword(s):  
Serine Proteases ◽  
Expressed Sequence Tag ◽  
Fat Body ◽  
Control Strategies ◽  
Catalytic Triad ◽  
Amino Acid Sequences ◽  
Pcr Analysis ◽  
Mrna Levels ◽  
Alternative Control ◽  
Sitodiplosis Mosellana

AbstractTwo full-length cDNA sequences encoding digestive serine proteases (designated as SmPROT-1 and SmPROT-2) were recovered from the midgut of the orange wheat blossom midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), in an ongoing expressed sequence tag project. The deduced amino acid sequences shared homology with digestive serine proteases from insect and non-insect species, including conserved regions such as the catalytic triad, active pocket, and conserved structural motifs. Secretory signal peptides in both proteases at the N-terminals indicate that these proteins could function as midgut digestive serine proteases. A phylogenetic analysis grouped SmPROT-1 and SmPROT-2 with trypsin-like and chymotrysin-like serine proteases, respectively. Quantitative real-time PCR analysis showed that SmPROT-1 and SmPROT-2 were expressed predominantly in the midgut rather than in other tissues (fat body and salivary glands). Expression analyses revealed high mRNA levels for the feeding instars (1st- and 2nd-instar larvae) compared with other stages (neonate, 3rd instar, pupa, and adult). These results provide new insights into the biology of S. mosellana and are discussed in the context of developing alternative control strategies.

Common Lambsquarters (Chenopodium album) Control in Corn (Zea mays) with Postemergence Herbicides and Cultivation

1995 ◽  
Vol 9 (4) ◽  
pp. 728-735 ◽  
Author(s):  
Robert J. Parks ◽  
William S. Curran ◽  
Gregory W. Roth ◽  
Nathan L. Hartwig ◽  
Dennis D. Calvin
Keyword(s):  
Zea Mays ◽  
Weed Control ◽  
Control Strategies ◽  
Chenopodium Album ◽  
Field Studies ◽  
Alternative Control ◽  
Common Lambsquarters ◽  
Postemergence Herbicides ◽  
Weed Emergence ◽  
Low Rate

Greenhouse studies assessed the susceptibility of three common lambsquarters biotypes to foliar-applied bromoxynil, dicamba, and thifensulfuron. Field studies evaluated the effectiveness of the same herbicides in conjunction with atrazine and row cultivation for the control of common lambsquarters in corn. In the field, bromoxynil was applied at 140, 280, and 420 g/ha, dicamba at 140, 280, and 560 g/ha, and thifensulfuron at 2, 3, and 4 g/ha. In the greenhouse, bromoxynil and thifensulfuron reduced common lambsquarters growth by at least 55%, while dicamba reduced growth 45% or less. Two of the three biotypes were resistant to atrazine. In the field, weed control was up to 70% better in cultivated plots than in noncultivated plots. Cultivation sometimes promoted additional weed emergence, but later emerging weeds rarely reached reproductive maturity. Atrazine improved the level of weed control only if triazine-susceptible weeds were present. The lowest rates of bromoxynil and dicamba (140 g/ha) controlled common lambsquarters 85% or greater even without cultivation, whereas control with the low rate of thifensulfuron (2 g/ha) was acceptable (greater than 85%) 8 wk after planting only in combination with cultivation. Combinations of reduced herbicide rates and mechanical cultivation provided effective, alternative control strategies for both triazine-resistant and susceptible common lambsquarters.

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