scholarly journals Inoculation of tomato plants with rhizobacteria suppresses development of whitefly Bemisia tabaci (GENNADIUS) (HEMIPTERA: ALEYRODIDAE): Agro-ecological application

PLoS ONE ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. e0231496
Author(s):  
Redouan Qessaoui ◽  
Abderrahim Amarraque ◽  
Hind Lahmyed ◽  
Abdelhadi Ajerrar ◽  
El Hassan Mayad ◽  
...  
Keyword(s):  
Bemisia Tabaci ◽  
Tomato Plants ◽  
Ecological Application

Time–dose–mortality data and modeling for the entomopathogenic fungus Aschersonia placenta against the whitefly Bemisia tabaci

2013 ◽  
Vol 59 (2) ◽  
pp. 97-101 ◽  
Author(s):  
Junzhi Qiu ◽  
Feifei Song ◽  
Lihui Mao ◽  
Jie Tu ◽  
Xiong Guan
Keyword(s):  
Relative Humidity ◽  
Sweet Potato ◽  
Bemisia Tabaci ◽  
Entomopathogenic Fungus ◽  
Mortality Data ◽  
Tomato Plants ◽  
Mortality Models ◽  
Conidial Concentration ◽  
Sweet Potato Whitefly ◽  
Time Dose

The fungus Aschersonia placenta FJSM was evaluated for control of the sweet potato whitefly, Bemisia tabaci. Bemisia tabaci nymphs (1st–4th instars) on tomato plants in the greenhouse (25–27 °C, 70%–85% relative humidity) were sprayed with suspensions containing 0, 104, 105, 106, 107, or 108 A. placenta FJSM conidia/mL. Mortality of fungus-treated 1st to 3rd instar nymphs ranged from 93% to 100% but was <25% for 4th instar nymphs; the fungus sporulated from 70% to 80% of the fungus-treated B. tabaci cadavers. LD50 and LD90 values decreased with time after treatment and increased with instar. LT50 values decreased with conidial concentration. The data were then described with time–dose–mortality models. The results indicate that A. placenta FJSM has potential as a mycoinsecticide for control of B. tabaci.

scholarly journals Rate of Tomato yellow leaf curl virus Translocation in the Circulative Transmission Pathway of its Vector, the Whitefly Bemisia tabaci

2001 ◽  
Vol 91 (2) ◽  
pp. 188-196 ◽  
Author(s):  
Murad Ghanim ◽  
Shai Morin ◽  
Henryk Czosnek
Keyword(s):  
Salivary Glands ◽  
Bemisia Tabaci ◽  
Virus Genome ◽  
Tomato Yellow Leaf ◽  
Yellow Leaf ◽  
Tomato Plants ◽  
Hemolymph Sample ◽  
Infected Tomato ◽  
Leaf Curl Virus ◽  
Leaf Curl

Whiteflies (Bemisia tabaci, biotype B) were able to transmit Tomato yellow leaf curl virus (TYLCV) 8 h after they were caged with infected tomato plants. The spread of TYLCV during this latent period was followed in organs thought to be involved in the translocation of the virus in B. tabaci. After increasing acquisition access periods (AAPs) on infected tomato plants, the stylets, the head, the midgut, a hemolymph sample, and the salivary glands dissected from individual insects were subjected to polymerase chain reaction (PCR) without any treatment; the presence of TYLCV was assessed with virus-specific primers. TYLCV DNA was first detected in the head of B. tabaci after a 10-min AAP. The virus was present in the midgut after 40 min and was first detected in the hemolymph after 90 min. TYLCV was found in the salivary glands 5.5 h after it was first detected in the hemolymph. Subjecting the insect organs to immunocapture-PCR showed that the virus capsid protein was in the insect organs at the same time as the virus genome, suggesting that at least some TYLCV translocates as virions. Although females are more efficient as vectors than males, TYLCV was detected in the salivary glands of males and of females after approximately the same AAP.

Probing and Feeding Behavior of Two Distinct Biotypes of Bemisia tabaci (Homoptera: Aleyrodidae) on Tomato Plants

1999 ◽  
Vol 92 (2) ◽  
pp. 357-366 ◽  
Author(s):  
Y. X. Jiang ◽  
H. Lei ◽  
J. L. Collar ◽  
B. Martin ◽  
M. Muñiz ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Bemisia Tabaci ◽  
Tomato Plants

Real-time PCR for the quantitation of Tomato yellow leaf curl Sardinia virus in tomato plants and in Bemisia tabaci

2008 ◽  
Vol 147 (2) ◽  
pp. 282-289 ◽  
Author(s):  
Giovanna Mason ◽  
Piero Caciagli ◽  
Gian Paolo Accotto ◽  
Emanuela Noris
Keyword(s):  
Real Time ◽  
Bemisia Tabaci ◽  
Real Time Pcr ◽  
Tomato Yellow Leaf ◽  
Yellow Leaf ◽  
Tomato Plants ◽  
Leaf Curl

scholarly journals Change in the Physiological and Biochemical Aspects of Tomato Caused by Infestation by Cryptic Species of Bemisia tabaci MED and MEAM1

Insects ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1105
Author(s):  
Claudia Aparecida de Lima Toledo ◽  
Franciely da Silva Ponce ◽  
Moisés Daniel Oliveira ◽  
Eduardo Santana Aires ◽  
Santino Seabra Júnior ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Cryptic Species ◽  
Bemisia Tabaci ◽  
Co2 Assimilation ◽  
Carboxylation Efficiency ◽  
Total Phenol Content ◽  
Offspring Performance ◽  
Tomato Plants ◽  
Increased Activity ◽  
Physiological And Biochemical

Infestation by Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) causes damage to tomatoes with production losses of up to 100%, affecting the physiological and biochemical aspects of host plants. The objective of this study was to analyze the influence of infestation of cryptic species of B. tabaci MED and MEAM1 on the physiological and biochemical aspects of tomato. Tomato plants ‘Santa Adélia Super’ infested with B. tabaci (MED and MEAM1), and non-infested plants were evaluated for differences in gas exchange, chlorophyll - a fluorescence of photosystem II (PSII), and biochemical factors (total phenols, total flavonoids, superoxide dismutase—SOD, peroxidase—POD, and polyphenol oxidase—PPO). Plants infested with B. tabaci MED showed low rates of CO2 assimilation and stomatal conductance of 55% and 52%, respectively. The instantaneous carboxylation efficiency was reduced by 40% in MED and by 60% in MEAM1 compared to the control. Regarding biochemical aspects, plants infested by MED cryptic species showed high activity of POD and PPO enzymes and total phenol content during the second and third instars when compared to control plants. Our results indicate that B. tabaci MED infestation in tomato plants had a greater influence than B. tabaci MEAM1 infestation on physiological parameters (CO2 assimilation rate (A), stomatal conductance (gs), and apparent carboxylation efficiency (A/Ci)) and caused increased activity of POD and PPO enzymes, indicating plant resistance to attack. In contrast, B. tabaci MEAM1 caused a reduction in POD enzyme activity, favoring offspring performance.

scholarly journals The Jekyll and Hyde case of Nesidiocoris tenuis (Reuter) in the management of Bemisia tabaci (Gennadius) on tomato plants under greenhouse conditions

2021 ◽  
Author(s):  
David Wari ◽  
Takeshi Saito ◽  
Motonori Takagi ◽  
Ryo Okada ◽  
Takuya Miyamoto ◽  
...  
Keyword(s):  
Biological Control ◽  
Bemisia Tabaci ◽  
Control Strategies ◽  
Field Tests ◽  
Cost Effective ◽  
Field Studies ◽  
Tomato Plants ◽  
Nesidiocoris Tenuis ◽  
Environmentally Safe

Abstract The rise of Nesidiocoris tenuis (Reuter) as a natural enemy of various greenhouse pests in protected systems is widely reported around the globe, mainly in the Mediterranean basin, Asia, and North and Central America. In-vitro studies on improving its growth and reproduction using artificial and factitious diets, and banker plants for its breeding and propagation, and the use of violet-light (LEDs) as the attraction mechanism are well established. However, field studies are lacking in integrating these biological control components to promote N. tenuis predation on greenhouse pests. First, we performed toxicity assays in-vitro and in field conditions. Results revealed that neonicotinoids and spinosyns were toxic to N. tenuis. Avermectins & milbemycins, pyridine azomethine derivatives and diamides, in contrast, were less to moderately toxic against N. tenuis but toxic to Bemisia tabaci, a known, widespread greenhouse pest. Field tests under greenhouse conditions were performed to evaluate the role of violet-LEDs in relocating N. tenuis from banker plants to tomato plants and their augmentative effect on the densities of B. tabaci. Results showed that the movement of N. tenuis from banker plants to tomato plants was accelerated when supplemented with violet-LEDs. The accelerated resettlement of N. tenuis on tomato plants aided by selective pesticides significantly reduced B. tabaci egg, nymph and adult densities, densities that were relatively the same compared to those of the greenhouse with conventional pest control strategies. Overall, comparable outcomes in managing a pest are possible when biological control agents are integrated with environmentally safe and cost-effective approaches.

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