scholarly journals Efficacy of Selected Insecticides as Replacement for Neonicotinoids in Managing Sweetpotato Whitefly on Poinsettia

2021 ◽  
pp. 1-8
Author(s):  
Gunbharpur Singh Gill ◽  
Juang Horng Chong
Keyword(s):  
Bemisia Tabaci ◽  
Foliar Spray ◽  
Euphorbia Pulcherrima ◽  
Spray Application ◽  
Sweetpotato Whitefly ◽  
Neonicotinoid Insecticides ◽  
Foliar Sprays ◽  
Effective Suppression ◽  
Application Methods

Management of sweetpotato whitefly (Bemisia tabaci), one of the most economically important pests of poinsettia (Euphorbia pulcherrima), relies heavily on neonicotinoid insecticides. Growers are seeking insecticide alternatives to neonicotinoids due to market demands. Although several systemic and translaminar insecticides have been suggested as alternatives to neonicotinoids, no published study has simultaneously compared their efficacies against sweetpotato whiteflies. This study compared the efficacies of 10 systemic and translaminar alternative insecticides with those of two systemic neonicotinoids, when all products were applied as foliar spray (twice at 14 d) or substrate drench (once) against sweetpotato whiteflies on poinsettia plants. Sweetpotato whitefly nymph and adult densities were examined 2 weeks before the first application (pretreatment), and weekly after the application for 8 weeks. Results showed that insecticides varied greatly in their efficacy, particularly against adults, and that spray application provided more effective suppression of nymphs than drench application. Spray and drench applications of imidacloprid and dinotefuran were consistently the most effective against sweetpotato whitefly nymphs and adults. Among the neonicotinoid alternatives, cyantraniliprole was the most effective insecticide in reducing sweetpotato whitefly nymph densities by both spray and drench application methods, with efficacy comparable to those of imidacloprid and dinotefuran. Although less effective than cyantraniliprole, foliar sprays of afidopyropen, chloratraniliprole, cyclaniliprole, flonicamid, flupyradifurone, pyrifluquinazon, spirotetramat, and sulfoxaflor + spinetoram were also effective against nymphs and could serve as partners in an insecticide rotation program.

scholarly journals Effect of foliar and soil application of nitrogen on the growth and yield of wheat

2018 ◽  
Vol 28 (4) ◽  
pp. 287-294
Author(s):  
MS Islam ◽  
H Akter ◽  
S Aktar ◽  
MJ Miah ◽  
M Farazi
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Foliar Spray ◽  
Dry Weight ◽  
Growth And Yield ◽  
Spray Application ◽  
Soil Application ◽  
Root Dry Weight ◽  
Biological Yield ◽  
Application Methods

A pot experiment was conducted at the Bangladesh Institute of Nuclear Agriculture, Mymensingh during the period from November 2013 to March 2014 to examine the effect of nitrogen application methods on the growth and yield of wheat. Two application methods (Foliar spray and soil application) and three varieties viz. Sotabdi, Kanchan and BAW56 were included and experimental test crop. From the study it was found that plant height. Total tillers plant-1,effect tillers plant-1,root dry weight plant-1,grains panicle-1, 100 grain weight, grain weight plant-1, straw weight plant-1, biological yield plant-1, and harvest indexwere significantly higher by foliar spray method than the soil application of nitrogen, Higher grain yield (9.01 g plant-1) was observed by the foliar spray application and lower grain yield was 6.07 g plant-1 obtained from the soil application. Among 3 varieties Sotabdi was found to be better yielding ability and produced comparatively higher plant height, total tillers plant-1, effective tillers plant-1,root dry weight plant-1, grains panicle-1, 100 grains weight, grains weight plan-1, straw weight plant-1, biological yield plant-1, in respect of harvest index values. BAW56 was observed as medium performed variety and Kanchan was the least. Regarding interaction effect of the variety Sotabdi also showed the highest plant-1, total tillers plant-1, effective tillers plant-1, root dry weight plant-1, grains panicle-1,100 grains weight, grains weight plant-1, straw weight plant-1, biological yield plant-1 and harvest index by foliar spray. The results indicated that all the varieties gave higher grain yields under foliar spray application method.Progressive Agriculture 28 (4): 287-294, 2017

SWEETPOTATO WHITEFLY BEMISIA TABACI (GENNADIUS) (HOMOPTERA: ALEYRODIDAE), A POTENTIAL INSECT PEST IN CANADA

1989 ◽  
Vol 121 (11) ◽  
pp. 1027-1028 ◽  
Author(s):  
A.B. Broadbent ◽  
R.G. Foottit ◽  
G.D. Murphy
Keyword(s):  
United States ◽  
Population Dynamics ◽  
Plant Species ◽  
Bemisia Tabaci ◽  
Insect Pest ◽  
The United States ◽  
Euphorbia Pulcherrima ◽  
Sweetpotato Whitefly

The sweetpotato whitefly, Bemisia tabaci (Gennadius), was accidentally imported into Canada on poinsettia, Euphorbia pulcherrima Willd., cuttings from the United States in 1987 and in 1988. The biology and population dynamics of B. tabaci were reviewed by Butler et al. (1986). It is a worldwide pest of more than 500 plant species in 74 families. Prior to 1986, there was only one report of this insect as a greenhouse pest, on vegetables in Turkey (Lopez-Avila and Cock 1986). Bemisia tabaci was first reported on poinsettia in Florida greenhouses in November 1986 (Price et al. 1987). In 1987, this insect was reported as a pest on field tomatoes in Florida (Schuster and Price 1987).

scholarly journals Foliar Application of Auxin for Rooting Stem Cuttings of Selected Ornamental Crops

2003 ◽  
Vol 21 (3) ◽  
pp. 131-136 ◽  
Author(s):  
Eugene K. Blythe ◽  
Jeff L. Sibley ◽  
Ken M. Tilt ◽  
John M. Ruter
Keyword(s):  
Root Development ◽  
Shoot Growth ◽  
Foliar Application ◽  
Foliar Spray ◽  
Naphthaleneacetic Acid ◽  
Stem Cuttings ◽  
Total Root Length ◽  
Spray Application ◽  
Ornamental Crops ◽  
Application Methods

Abstract Research was conducted to determine whether a foliar spray application of the commercial root-promoting formulation Dip 'N Grow® [10,000 ppm indole-3-butyric acid (IBA) and 5,000 ppm 1-naphthaleneacetic acid] or the potassium (K) salt of IBA (K-IBA) would be as effective as a basal quick-dip for rooting stem cuttings of selected ornamentals. Cuttings of Chrysanthemum pacficum sprayed with Dip 'N Grow® at 50 + 25 ppm IBA + NAA or K-IBA at 0 to 50 ppm showed generally similar root development measures compared to a basal quick-dip; an exception was 10 ppm K-IBA which produced greater total root length. Cuttings of Forsythia x intermedia ‘Lynwood Gold’ typically did not differ in root development under the two application methods, but cuttings sprayed with Dip 'N Grow® at 0 + 0 to 10 + 5 ppm IBA + NAA exhibited greater shoot growth 80 days after sticking (insertion into the rooting substrate) than cuttings receiving a basal quick-dip. Root and shoot development measures were similar or lower for cuttings of Abelia x grandiflora, Hydrangea paniculata, and Lagerstroemia (indica x fauriei) ‘Natchez’ sprayed with auxin compared to a basal quick-dip.

scholarly journals Correcting Iron Deficiency in Calibrachoa Grown in a Container Medium at High pH

2003 ◽  
Vol 13 (2) ◽  
pp. 308-313 ◽  
Author(s):  
Paul R. Fisher ◽  
Ron M. Wik ◽  
Brandon R. Smith ◽  
Claudio C. Pasian ◽  
Monica Kmetz-González ◽  
...  
Keyword(s):  
Foliar Spray ◽  
Cost Effective ◽  
Fe Deficiency ◽  
Tetraacetic Acid ◽  
Medium Ph ◽  
Foliar Sprays ◽  
Effective Option ◽  
Hydroxyphenylacetic Acid ◽  
Leaf Necrosis ◽  
Application Methods

The objective was to evaluate and compare foliar spray and soil drench application methods of iron (Fe) for correcting Fe deficiency in hybrid calibrachoa (Calibrachoa × hybrida) grown in a container medium at pH 6.9 to 7.4. Untreated plants showed severe chlorosis and necrosis, stunting, and lack of flowering. An organosilicone surfactant applied at 1.25 mL·L-1 (0.160 fl oz/gal) increased uptake of Fe from foliar applications of both ferrous sulfate (FeSO4) and ferric ethylenediamine tetraacetic acid (Fe-EDTA). Foliar sprays at 60 mg·L-1 (ppm) Fe were more effective when Fe was applied as Fe-EDTA than FeSO4. Increasing Fe concentration of foliar sprays up to 240 mg·L-1 Fe from Fe-EDTA or 368 mg·L-1 Fe (the highest concentrations tested) from ferric diethylenetriamine pentaacetic acid (Fe-DTPA) increased chlorophyll content compared with lower spray concentrations, but leaf necrosis at the highest concentrations may have been caused by phytotoxicity. Drenches with ferric ethylenediaminedi(o-hydroxyphenylacetic) acid (Fe-EDDHA) at 20 to 80 mg·L-1 Fe were highly effective at correcting Fe-deficiency symptoms, and had superior effects on plant growth compared with drenches of Fe-DTPA at 80 mg·L-1 Fe or foliar sprays. Efficacy of Fe-DTPA drenches increased as concentration increased from 20 to 80 mg·L-1 Fe. An Fe-EDDHA drench at 20 to 80 mg·L-1 Fe was a cost-effective option for correcting severe Fe deficiency at high medium pH.

scholarly journals Comparison of Commercially and Locally Produced Encarsia formosa Gahan on the Control of Sweetpotato Whitefly on Poinsettias

1994 ◽  
Vol 4 (3) ◽  
pp. 295-298 ◽  
Author(s):  
R.W. McMahon ◽  
R.K. Lindquist ◽  
B.D. Baith ◽  
T.L. Makin ◽  
M.L. Casey
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Bemisia Tabaci ◽  
Euphorbia Pulcherrima ◽  
Encarsia Formosa ◽  
Sweetpotato Whitefly ◽  
Greenhouse Whitefly

A 2-year demonstration study was conducted to compare the effectiveness of two sources of Encarsia formosa (EF) on the biological control of the sweetpotato whitefly (SPWF) (Bemisia tabaci Gennadius) on poinsettias (Euphorbia pulcherrima Wild.). Commercially produced EF were raised on the greenhouse whitefly (GHWF) (Trialuerodes vaporariorum Westwood), while the locally produced EF were raised on the SPWF. Results showed that SPWF populations were reduced considerably both years, and maximum nymph parasitism ranged from 60% to >80%. No large differences were observed in the ability of EF to control SPWF populations whether raised on SPWF or GHWF nymphs. This study suggests that there is potential for controlling SPWF populations on poinsettia by EF in conjunction with an integrated pest management (IPM) program.

Temperature and Diel Catches of Trialeurodes vaporariorum and Bemisia tabaci (Homoptera: Aleyrodidae) Adults on Sticky Traps in the Greenhouse

1994 ◽  
Vol 29 (2) ◽  
pp. 222-230 ◽  
Author(s):  
Tong-Xian Liu ◽  
Ronald D. Oetting ◽  
G. David Buntin
Keyword(s):  
Bemisia Tabaci ◽  
Activity Patterns ◽  
Trialeurodes Vaporariorum ◽  
Flight Activity ◽  
Euphorbia Pulcherrima ◽  
Plant Canopy ◽  
Gerbera Jamesonii ◽  
Sweetpotato Whitefly ◽  
Greenhouse Whitefly ◽  
Sticky Traps

Patterns of diel flight activity of the greenhouse whitefly, Trialeurodes vaporariorum (Westwood), and sweetpotato whitefly, Bemisia tabaci (Gennadius), were investigated on poinsettia, Euphorbia pulcherrima Willd., and gerbera daisy, Gerbera jamesonii H. Bolus, under greenhouse and environmentally controlled conditions. Adult flight activity was monitored at 2-h intervals (from 0700 to 2100 h EST) at various heights using yellow sticky traps. Traps placed 5 cm above the top of the plant canopy caught more adults of both species than traps placed higher. The daily patterns of catches of T. vaporariorum and B. tabaci adults in the greenhouse were similar and were unimodal with peak catches occurring between 0900–1300 h. Numbers of adults caught on the sticky traps in the greenhouse were correlated with temperature and relative humidity for T. vaporariorum, but not for B. tabaci. Few adults were caught during the dark hours (from 2100 to 0700 h). Under constant temperatures of 20°, 25°, and 30°C, the flight activity patterns of both whitefly species were unimodal, with peak catches of T. vaporariorum and B. tabaci occurring in the morning and afternoon, respectively. Differences in temperature did not significantly alter the pattern of catches of adults on sticky traps. The lowest temperature for initiation of whitefly flight was 16–17°C for T. vaporariorum, and 17–18°C for B. tabaci.

scholarly journals Control of Beach Vitex (Vitex rotundifolia) with Foliage and Cut Stem Herbicide Applications

2016 ◽  
Vol 34 (1) ◽  
pp. 1-6
Author(s):  
Ted Whitwell ◽  
Jeanne A. Briggs ◽  
Matthew M. Cousins
Keyword(s):  
Foliar Application ◽  
Control Strategies ◽  
Foliar Spray ◽  
Field Studies ◽  
Effective Control ◽  
Control Methods ◽  
Spray Application ◽  
Application Methods ◽  
The Many

The many invasive characteristics of Vitex rotundifolia L. f. [beach vitex (BV)] and the ecological concerns surrounding its presence along the coast have necessitated the development of effective control methods. The purpose of these studies was to evaluate various herbicides using cut stem and foliar application methods to develop effective control strategies. An observational case study on a beach dune site indicated that beach vitex regrowth occurred three years after the initial cut stem glyphosate (treatments at 2.4 g ai·cm−1 (0.2 oz ai·in−1) and served to direct experiments using both greenhouse and field studies. Glyphosate, imazapyr, and triclopyr were evaluated in greenhouse studies. An imazapyr solution at 1.2 g ai·cm−1 (0.1 oz ai·in−1) applied to recently cut stems effectively controlled beach vitex in both greenhouse and field studies. Foliar applications of imazapyr in greenhouse and field studies confirmed that it effectively controlled beach vitex at rates of 1.0, 1.4 and 2.0 kg ai·ha−1 (0.89, 1.25 and 1.79 lb ai·A−1). Imazapyr effectively controlled beach vitex in these studies whether applied either as a cut stem treatment or as a foliar spray application. Ineffective control was observed from glyphosate and triclopyr applications, which resulted in beach vitex regrowth.

scholarly journals Determination of seasonal activity of the sweetpotato whitefly (Homoptera: Aleyrodidae) and leafhoppers (Homoptera: Cicadellidae) by plastic cup traps on the Çukurova Plain, Turkey.

2010 ◽  
Vol 41 (No. 1) ◽  
pp. 8-13 ◽  
Author(s):  
K. Karut ◽  
C. Chu C ◽  
T.J. Henneberry ◽  
C. Kazak
Keyword(s):  
Bemisia Tabaci ◽  
Seasonal Activity ◽  
Sweetpotato Whitefly ◽  
Daily Minimum ◽  
Trap Catches

The flight activities of adult sweetpotato whitefly, Bemisia tabaci, and leafhoppers were monitored by plastic cup traps at Boğalı, Taşçı, Hacıali, Doğankent and Balcalı in the Çukurova Plain, Turkey, in 2001 and 2003. Activity of B. tabaci, expressed as numbers of adults caught in traps, was low from May to early July in both years. Numbers of B. tabaci caught at Tasçı were higher than at Boğalı from 10 July and 21 August in 2001. Its numbers were also higher at Doğankent than at Hacıali and Balcalı during August of 2003. The numbers of leafhopper adults caught fluctuated greatly in both years. Numbers remained low until late June, followed by gradual increases in July and August at Boğalı and Taşçı in 2001. In contrast, numbers of adults caught were higher at Hacıali, Doğankent and Balcalı from May through July in 2003, followed by lower catches during the remainder of the season. Daily minimum temperatures in July and August were positively correlated with higher trap catches of both B. tabaci and leafhoppers.

Sign in / Sign up

Export Citation Format

Share Document