scholarly journals The effect of a homoeopathic preparation of sweetpotato whitefly (bemisia tabaci genn.) in the control of the invasion of tomato plants (lycopersicon esculentum l.) by sweetpotato whitefly

1999 ◽  
Author(s):  
◽  
Angela Moira Carey
Keyword(s):  
Lycopersicon Esculentum ◽  
Bemisia Tabaci ◽  
Effective Control ◽  
Agricultural Crops ◽  
Sweetpotato Whitefly ◽  
Tomato Plants ◽  
Control Options ◽  
Major Pest ◽  
Financial Losses

The most common and difficult insect to control in the greenhouse is the whitefly. Sweetpotato whitefly (Bemisia tabaci Genn.) was the species of whitefly selected to be investigated in this trial. Sweetpotato whitefly is a major pest on a variety of plants, ranging from ornamental flowers to agricultural crops such as tomato and cotton, resulting in important financial losses. Effective control options of sweetpotato whitefly are limited.

scholarly journals Relationship of the Sweetpotato Whitefly to a New Tomato Fruit Disorder in Florida

HortScience ◽  
1990 ◽  
Vol 25 (12) ◽  
pp. 1618-1620 ◽  
Author(s):  
D.J. Schuster ◽  
T.F. Mueller ◽  
J.B. Kring ◽  
J.F. Price
Keyword(s):  
Lycopersicon Esculentum ◽  
Bemisia Tabaci ◽  
Tomato Fruit ◽  
Sweetpotato Whitefly ◽  
Field Cage ◽  
Tomato Plants ◽  
White Tissue ◽  
Relationship Of

A new disorder of fruit has been observed on tomato (Lycopersicon esculentum Mill.) in Florida. The disorder, termed irregular ripening, was associated with field populations of the sweetpotato whitefly, Bemisia tabaci (Gennadius) and is characterized by incomplete ripening of longitudinal sections of fruit. An increase in internal white tissue also was associated with whitefly populations. In field cage studies, fruit on tomato plants not infested with the sweetpotato whitefly exhibited slight or no irregular ripening, whereas fruit from infested plants did. Fruit from plants on which a whitefly infestation had been controlled before the appearance of external symptoms exhibited reduced symptoms compared to fruit from plants on which an infestation was uncontrolled.

scholarly journals Severe Yellowing Outbreaks in Tomato in Spain Associated with Infections of Tomato chlorosis virus

Plant Disease ◽  
2000 ◽  
Vol 84 (8) ◽  
pp. 835-837 ◽  
Author(s):  
J. Navas-Castillo ◽  
R. Camero ◽  
M. Bueno ◽  
E. Moriones
Keyword(s):  
Lycopersicon Esculentum ◽  
Bemisia Tabaci ◽  
Disease Outbreaks ◽  
Fruit Growth ◽  
Southern Spain ◽  
Tomato Plants ◽  
First Report ◽  
Yellowing Disease ◽  
Disease Agent ◽  
Tomato Chlorosis Virus

Since 1997, yellowing disease outbreaks have occurred in tomato (Lycopersicon esculentum) crops in southern Spain. The outbreaks were associated with high populations of the whitefly Bemisia tabaci. Symptoms consisted mainly of interveinal yellowing that developed initially on lower leaves and then progressed to the upper part of the plant. Affected plants were less vigorous and yielded less due to reduced fruit growth and delayed ripening. During 1998 and 1999, the yellowing disease was widespread and occurred at high incidences in the Málaga province. The disease agent was readily transmissible from tomato to tomato by B. tabaci biotype Q. Samples from symptomatic tomato plants were analyzed and shown to be infected with Tomato chlorosis virus (ToCV) (genus Crinivirus, family Closteroviridae). This is the first report of ToCV epidemics in Europe.

scholarly journals Sub-Lethal Effects of Partially Purified Protein Extracted from Beauveria bassiana (Balsamo) and Its Presumptive Role in Tomato (Lycopersicon esculentum L.) Defense against Whitefly (Bemisia tabaci Genn.)

Insects ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 574
Author(s):  
Azhar Uddin Keerio ◽  
Talha Nazir ◽  
Tauqir Anwar ◽  
Muhammad Zeeshan Majeed ◽  
Yusuf Ali Abdulle ◽  
...  
Keyword(s):  
Lycopersicon Esculentum ◽  
Beauveria Bassiana ◽  
Bemisia Tabaci ◽  
Defense Mechanisms ◽  
Tomato Plants ◽  
Fungal Protein ◽  
Fecundity Rate ◽  
Survival Percentage ◽  
Putative Role

Plants rely on various physiological and molecular defense mechanisms against biotic stresses such as herbivore insects. Many entomopathogenic fungi synthesize protein molecules that can trigger these plant defenses. This laboratory study characterized the bioactivity of a partially purified protein derived from Beauveria bassiana (ARSEF 2860) against whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae), which is an economically important pest of agricultural and horticultural crops worldwide. Different concentrations (i.e., 0.021, 0.042 and 0.063 μM) of fungal protein were bioassayed to determine their sub-lethal effect on the survival percentage and fecundity rate of B. tabaci on tomato (Lycopersicon esculentum) plants. In addition, the putative role of this partially purified B. bassiana protein in the defense mechanisms of plant was assessed through the expression analyses of important genes related to salicylic acid (SA)—and jasmonic acid (JA)—associated pathways using RT-qPCR. Results revealed a significant suppression of the survival percentage and fecundity rate of B. tabaci by the fungal protein. Lowest survival (41%) was recorded for the highest concentration of protein (0.063 μM), whereas mean survival for the other two protein concentrations (0.042 and 0.021 μM) were 62 and 71%, respectively. Likewise, the highest and lowest mean fecundity rates were observed for the control and the highest protein concentration (i.e., 3.3 and 1.8 eggs day−1 female−1, respectively). Furthermore, the exogenous application of B. bassiana-derived protein on tomato plants strongly up-regulated the SA-related genes (PAL, PR1, BGL2 and EDS1) and slightly up-regulated the JA-related genes (AOC, AOS, OPR3 and LOX) as compared to the control plants. These findings demonstrate the putative role of this partially purified B. bassiana protein fraction in inducing systemic resistance in the tomato plants against B. tabaci, suggesting its further purification and characterization to be used as novel biological pest control tool against B. tabaci and other sap-sucking insect pests.

scholarly journals 215 THE INFLUENCE OF SWEETPOTATO WHITEFLY MANAGEMENT AND POTASSIUM FERTILIZATION ON YIELD AND IRREGULAR RIPENING OF TOMATO

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 460c-460
Author(s):  
A. A. Csizinszky ◽  
D. J. Schuster
Keyword(s):  
Lycopersicon Esculentum ◽  
Bemisia Tabaci ◽  
Fruit Yield ◽  
Sweetpotato Whitefly ◽  
Whitefly Population ◽  
Lycopersicon Esculentum Mill ◽  
Potassium Fertilization

Two insecticidal spray frequencies, 0 and 3x per week, against the sweetpotato whitefly, Bemisia tabaci Gennadius, were evaluated at three K rates, 190, 380 and 760 kg.ha-1, for their effect on whitefly population, fruit yield and incidence of irregular ripening on tomato, Lycopersicon esculentum Mill., cv. Sunny. Whitefly populations were reduced with three weekly sprays, but not by K rates. Early yields were best with three weekly sprays and with the highest K rate. For the season, yield of extra large (≥ 70 mm diameter) fruit was reduced with three weekly sprays and with increasing K rates. Proportions of irregularly ripened fruits were similar with either spray frequency, but were reduced at the highest K rate.

scholarly journals Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato

Insects ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 213 ◽  
Author(s):  
Hugh A. Smith ◽  
Karol L. Krey
Keyword(s):  
North America ◽  
Bemisia Tabaci ◽  
Chemical Control ◽  
Sweetpotato Whitefly ◽  
Release Rates ◽  
Tomato Plants ◽  
The Third ◽  
Greenhouse Tomato ◽  
Banker Plant ◽  
Predator Release

The sweetpotato whitefly, Bemisia tabaci, is a pest of greenhouse-grown tomato. Restrictions on insecticides in enclosed structures and the presence of commercial pollinators limit the options for the chemical control of whiteflies in greenhouses, increasing the importance of biological controls. Dicyphus hesperus is a zoophytophagous mirid predator native to North America. Three release rates of D. hesperus were evaluated on greenhouse tomato for control of the sweetpotato whitefly. The release rates were one, two or three adult D. hesperus per tomato plant each week for three weeks in cages containing four tomato plants and one mullein banker plant. There were fewer whitefly eggs in cages receiving predators than untreated cages one week after the third release, and fewer whitefly nymphs in cages receiving predators two weeks after the third release. There were no statistical differences in whitefly eggs or nymphs among predator release treatments. The highest release rate resulted in a 60% reduction in whitefly nymphs. Forty-two days after the first predator releases, there were no differences among release treatments in the number of D. hesperus. Our results indicate that D. hesperus can contribute management of B. tabaci on greenhouse tomato, but that it may be insufficient as a sole strategy.

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.

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