scholarly journals New records of predation on eggs of Bemisia tabaci (Hemiptera: Aleyrodidae) by Chrysopodes (Chrysopodes) lineafrons (Neuroptera: Chrysopidae) in Northwestern Argentina

Author(s):  
Eugenia S. Ortega ◽  
Cecilia A. Veggiani ◽  
Ana L. Avila ◽  
Carmen Reguilon

Bemisia tabaci has become a major economic importance pest, affecting several crops worldwide. Among their natural enemies, species of Chrysopidae family, with larvae predators of different pests, are a very effective biological control agent. The developmental time and survival of the immature stages of Chrysopodes (Chrysopodes) lineafrons, and the longevity and oviposition of adults fed with eggs of B. tabaci was determined. C. (C.) lineafrons adults were collected in tomato crops in Lules department, Tucumán province. To determine the developmental duration of each instar, and larvae survival, 90 eggs of C. (C.) lineafrons were randomly selected, of which only 71 eggs hatched; of these, 34 larvae were fed with B. tabaci eggs and 37 with Sitotroga cerealella eggs, used as control. Oviposition and longevity of adults fed with the two preys were recorded. C. (C.) lineafrons larvae consumed an average of 127.04 B. tabaci eggs and 44 S. cerealella eggs per day. Mean developmental time of C. (C.) lineafrons fed with B. tabaci eggs was 45 days; while for those fed with S. cerealella eggs it was 35 days. Immature stages survival, number of eggs per adults and longevity were higher when C. (C.) lineafrons were fed with S. cerealella eggs than with B. tabaci eggs. C. (C.) lineafrons proved to be an efficient predator, thus representing an excellent tool for the biological control of B. tabaci in tomato crops .

2016 ◽  
Author(s):  
Eugenia S. Ortega ◽  
Cecilia A. Veggiani ◽  
Ana L. Avila ◽  
Carmen Reguilon

Bemisia tabaci has become a major economic importance pest, affecting several crops worldwide. Among their natural enemies, species of Chrysopidae family, with larvae predators of different pests, are a very effective biological control agent. The developmental time and survival of the immature stages of Chrysopodes (Chrysopodes) lineafrons, and the longevity and oviposition of adults fed with eggs of B. tabaci was determined. C. (C.) lineafrons adults were collected in tomato crops in Lules department, Tucumán province. To determine the developmental duration of each instar, and larvae survival, 90 eggs of C. (C.) lineafrons were randomly selected, of which only 71 eggs hatched; of these, 34 larvae were fed with B. tabaci eggs and 37 with Sitotroga cerealella eggs, used as control. Oviposition and longevity of adults fed with the two preys were recorded. C. (C.) lineafrons larvae consumed an average of 127.04 B. tabaci eggs and 44 S. cerealella eggs per day. Mean developmental time of C. (C.) lineafrons fed with B. tabaci eggs was 45 days; while for those fed with S. cerealella eggs it was 35 days. Immature stages survival, number of eggs per adults and longevity were higher when C. (C.) lineafrons were fed with S. cerealella eggs than with B. tabaci eggs. C. (C.) lineafrons proved to be an efficient predator, thus representing an excellent tool for the biological control of B. tabaci in tomato crops .


Intropica ◽  
2017 ◽  
Author(s):  
Eugenia S. Ortega ◽  
Cecilia A. Veggiani Aybar ◽  
Ana L. Ávila ◽  
Carmen Reguilón

Bemisia tabaci has become one of the major pests of economic importance that affects several crops worldwide. Among their natural enemies are found the Chrysopidae family, with larvae predators of different pests resulting very effective biological control agents. In order to contribute to possible use of this beneficial insect in B. tabaci biological control, the developmental time and survival of the immature stages of Chrysopodes (Chrysopodes) lineafrons was determined, as well as longevity and oviposition of the adults fed with eggs of B. tabaci. Chrysopodes (C.) lineafrons adults were collected in tomato crops in Lules department, Tucumán province. To determine the developmental duration for each instars and survival of the larvae, 90 eggs of C. (C.) lineafrons were randomly selected, of which only 71 eggs hatched; of these, 34 larvae were fed with B. tabaci eggs and 37 with Sitotroga cerealella eggs, used as control. The oviposition and longevity of the adults were recorded, both fed with the two preys. Chrysopodes (C.) lineafrons larvae consumed an average 127.04 (± 40.2) eggs of B. tabaci and 44 (± 19.04) eggs of S. cerealella per day. Mean developmental time of C. (C.) lineafrons fed with B. tabaci eggs was 45 (± 3.54) days and 35 (± 5.04) days with S. cerealella eggs. Survival of immature stages, number of eggs per adults and their longevity were higher when C. (C.) lineafrons were fed with S. cerealella eggs than with B. tabaci eggs. Chrysopodes (C.) lineafrons has proved to be an efficient predator which would represent an excellent tool for B. tabaci biological control in tomato crops.


Insects ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 619 ◽  
Author(s):  
Ibrahim Sani ◽  
Siti Izera Ismail ◽  
Sumaiyah Abdullah ◽  
Johari Jalinas ◽  
Syari Jamian ◽  
...  

Whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), consists of genetically diverse species known to cause significant destruction in several crops around the world. Nymphs and adults of B. tabaci cause damage to plants during feeding, and they can act as a virus vector, thus causing significant yield loss to crops in the tropical and subtropical regions. Chemical pesticides are widely used to control B. tabaci due to their immediate action, but this approach has several drawbacks including food safety issues, insecticide resistance, environmental pollution, and the effect on non-target organisms. A biological control agent using entomopathogenic fungi (EPF) has therefore been developed as an alternative against the conventional use of chemical pesticides in an integrated pest management (IPM) system to effectively control B. tabaci. It is apparent from this review that species of hyphomycetes fungi are the most common EPF used to effectively control B. tabaci, with the second instar being the most susceptible stage of infection. Therefore, this review article focuses specifically on the control of B. tabaci with special emphasis on the use of EPF as biological control agents and their integration in IPM.


2015 ◽  
Vol 106 (2) ◽  
pp. 215-224 ◽  
Author(s):  
Héctor Martínez-García ◽  
Luis R Román-Fernández ◽  
María G Sáenz-Romo ◽  
Ignacio Pérez-Moreno ◽  
Vicente S Marco-Mancebón

AbstractFor optimal application of Nesidiocoris tenuis as a biological control agent, adequate field management and programmed mass rearing are essential. Mathematical models are useful tools for predicting the temperature-dependent developmental rate of the predator. In this study, the linear model and nonlinear models Logan type III, Lactin and Brière were estimated at constant temperatures and validated at alternating temperatures and under field conditions. N. tenuis achieved complete development from egg to adult at constant temperatures between 15 and 35°C with high survivorship (>80%) in the range 18–32°C. The total developmental time decreased from a maximum at 15°C (76.74 d) to a minimum at 33°C (12.67 d) and after that, increased to 35°C (13.98 d). Linear and nonlinear developmental models all had high accuracy (Ra2 >0.86). The maximum developmental rate was obtained between 31.9°C (Logan type III and Brière model for N1) and 35.6°C (for the egg stage in the Brière model). Optimal survival and the highest developmental rate fell within the range 27–30°C. The field validation revealed that the Logan type III and Lactin models offered the best predictions (95.0 and 94.5%, respectively). The data obtained on developmental time and mortality at different temperatures are useful for mass rearing this predator, and the developmental models are valuable for using N. tenuis as a biological control agent.


2005 ◽  
Vol 40 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Tong-Xian Liu ◽  
Philip A. Stansly

The potential of a lady beetle, Nephaspis oculatus (Blatchley), to serve as a biological control agent of the sweetpotato whitefly, Bemisia tabaci (Gennadius) Biotype “B” (= B. argentifolii Bellows & Perring), was evaluated on hibiscus under confined conditions, in large cages (60 × 60 × 60 cm) and on sweetpotato leaves in small clear cup cages (0.9 L). Nephaspis oculatus suppressed B. tabaci populations and provided marketable hibiscus plants when released 1 d after whitefly introduction in large cages at ratios of 1:4 and 1:20 beetle:whitefly. When beetles were released 7 d after the whitefly infestation, significant pest reduction and marketable plants were obtained with the 1:4 beetle:whitefly ratio but not the 1:20 ratio. In clear cup cages on sweet potato leaves, significant suppression was obtained at beetle:whitefly ratios of 1:6.7, 1:10 and 1:20 when N. oculatus was released 1 d after the whitefly infestation. These results help define release parameters for successful use of N. oculatus as a biological control agent of whiteflies under confined conditions.


1970 ◽  
Vol 102 (5) ◽  
pp. 578-585 ◽  
Author(s):  
B. Gray

AbstractPoecilips pteridophytae Schedl is the first species of Scolytidae to be found on a fern. It appears to be fairly widely distributed in New Guinea on the tropical bracken fern, Pteridium aquilnum (L.). The association is most probably of recent evolutionary origin. The immature stages are described in the text. Its life history is relatively short, the life cycle raking 2 to 4 mouths, and takes place wholly width the stem of the fern, except for emigrating adults. P. pteridophytae may have considerable economic potential as a biological control agent of bracken fern in countries where it is a pest.


Check List ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 595-600
Author(s):  
Priscila Andre Sanz-Veiga ◽  
Silvana Lampert ◽  
Marcoandre Savaris

The geographical distribution of the weevil Cissoanthonomus tuberculipennis Hustache, 1939 is extended in Brazil, with new records from the municipalities of Charqueada and Piracicaba, state of São Paulo. These are the second and third records of C. tuberculipennis in Brazil. The specimens were collected from infested fruits of Cardiospermum grandiflorum Sw. (Sapindaceae) in riparian forests along watercourses.


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