scholarly journals Preference of Orius insidiosus and Orius tristicolor (Hemiptera: Anthocoridae) for Host Plants in Olfactometry and Free-Choice Experiments

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
María E. Lorenzo ◽  
Leticia Bao ◽  
Luciana Mendez ◽  
Gabriela Grille ◽  
Olivier Bonato ◽  
...  
Keyword(s):  
Host Plants ◽  
Free Choice ◽  
Choice Experiments ◽  
Orius Insidiosus

scholarly journals Varietal Preference of Lipaphis erysimi (Kaltenbach) on Three Species of Brassica

1970 ◽  
Vol 17 ◽  
pp. 145-148 ◽  
Author(s):  
Pankoj Kumar Sarker ◽  
Md Matiur Rahman ◽  
Bidhan Chandra Das
Keyword(s):  
Host Plants ◽  
Free Choice ◽  
Lower Cost ◽  
Sowing Date ◽  
Aphid Population ◽  
Lipaphis Erysimi ◽  
Field Crop ◽  
Aphid Infestation ◽  
Crop Condition ◽  
Varietal Preference

Context: Lipaphis erysimi have different type of preference to settle on different varieties of mustard. Pest preferential movement is important for ecofriendly pest control.Objectives: The aim of this study was to determine the L. erysimi resistance varieties of mustard to get more yields by lower cost and avoid most aphid infesting varieties for higher costMaterials and Methods: Two criteria were used to determine the varietal preference of L. erysimi, viz. (i) dispersal of aphids by cutting the base of host plants and enforce to settle on different varieties of three species of Brassica under free choice conditions, and (ii) suitability of those varieties based on the aphid infestation in the field crop condition at same season. Results: The preferential movement of L. erysimi on ten varieties of Brassica showed significant differences (P<0.01). The variety, Bari sharisa-6 showed highest (90.00 ± 7.21) aphid settlement followed by the variety, Rai-5 (89.00 ± 5.69). The variety, Bari sharisa-10 showed lowest (10.00 ± 0.58) aphid settlement followed by the variety, Bari sharisa-11 (19.00 ± 3.61). Naturally infested aphid population on first sowing date was recorded highest (2.1 ± 0.79) on the variety Bari Sarisha-8, followed by Bari Sarisha-6 (1.93 ± 0.88). The lowest (0.19 ± 0.09) number of aphids recorded on Bari Sarisha-12. In second sowing date, Bari Sarisha-7 showed highest (19.5 ± 6.51) aphid population, followed by Bari Sarisha-8 (15.42 ± 5.72). The lowest (1.2 ± 0.38) aphid population found on the variety, Bari Sarisha-11. In third sowing date, highest (14.69 ± 5.69) number of aphids was recorded on the variety, Bari Sarisha-6, followed by the variety, Sonali-75 (14.48±4.74). Lowest number (6.06 ± 2.30) of aphids was found on the variety, Bari Sarisha-12. In the fourth sowing date, highest (15.54 ± 5.72) aphid population recorded on the variety, Bari Sarisha-8, followed by Bari Sarisha-7 (14.39 ± 5.70); and the lowest (4.41 ± 1.75) number of aphids recorded on the variety, Bari Sarisha-9. Key words:  Lipaphis erysimi; varietal preference; Brassica; Sarisha; Rai.DOI: 10.3329/jbs.v17i0.7123J. bio-sci. 17: 145-148, 2009

scholarly journals Leaf consumption by Diabrotica speciosa (Coleoptera: Chrysomelidade) adults on difFerent host plants

2003 ◽  
Vol 60 (4) ◽  
pp. 789-792 ◽  
Author(s):  
Crébio José Ávila ◽  
José Roberto Postali Parra
Keyword(s):  
Leaf Area ◽  
Host Plants ◽  
Free Choice ◽  
Food Type ◽  
Choice Test ◽  
Multiple Choice Tests ◽  
Circular Pattern ◽  
Leaf Consumption ◽  
Choice Tests ◽  
Diabrotica Speciosa

Studies related to the feeding behavior of pest insects provide information that will aid the development of control tactics. Leaf consumption by Diabrotica speciosa adults fed on bean, corn, potato and soybean was determined in the laboratory under free-choice (multiple or double-choice) and no-choice (confinement) conditions. In the multiple-choice tests leaf circles were randomly arranged in a circular pattern (arena) inside Petri dishes. The degree of preference for the hosts was determined under double-choice conditions, where common bean was considered the standard host and the remaining plants (soybean, potato and corn) as test hosts. In all trials, two Diabrotica speciosa couples were released and maintained within the dish for 24 hours; the leaf area consumed by the insects was determined after this feeding period. Food type (host) influenced leaf area consumption by D. speciosa adults both in free-choice and in no-choice tests (P < 0.05). Under free-choice conditions, the insects preferred to feed on bean rather than on soybean, potato or corn, with no differences among these last three host plants (P > 0.05). As to the no-choice test, the consumption was higher for corn than for potato, probably to compensate the low nutritional quality of the first host.

Field Test of the WeevilHadroplonthus trimaculatusand the FleabeetlePsylliodes chalcomeraAgainst Musk Thistle (Carduus nutans)

Weed Science ◽  
1993 ◽  
Vol 41 (4) ◽  
pp. 656-663 ◽  
Author(s):  
Paul H. Dunn ◽  
Gaetano Campobasso
Keyword(s):  
Biological Control ◽  
North America ◽  
Field Test ◽  
Host Plants ◽  
Free Choice ◽  
Natural Populations ◽  
Field Trials ◽  
Biological Control Of Weeds ◽  
Carduus Nutans ◽  
Test Plants

This study was conducted to determine if field evaluations could be used to select insects for biological control of musk thistle. Host specificity and larval development of a weevil,Hadroplonthus trimaculatus, and a fleabeetle,Psylliodes chalcomera, were studied in field trials near Rome, Italy, in which insects were allowed free choice of several hosts. Natural populations of these two insects, which do not occur in North America, were exposed to North American species ofCirsium, Carduus, and selected crops. Adult insects and larvae on host plants were identified and counted on test plants from North America and native attraction plants. In addition to infesting musk thistle, weevil adults and larvae were recorded on flodman thistle, wavyleaf thistle, and spinosissimum thistle. Consequently, this insect was not suitable for introduction into North America. The fleabeetle would be satisfactory for biological control since no adults or larvae were recorded onCirsiumspp. or economic plants. These studies show that field trials are a valid method for identifying specific and nonspecific candidate insects for biological control of weeds.

scholarly journals Coffee Berry Borer Resistance in Coffee Genotypes

2010 ◽  
Vol 53 (2) ◽  
pp. 261-268 ◽  
Author(s):  
Gustavo Hiroshi Sera ◽  
Tumoru Sera ◽  
Dhalton Shiguer Ito ◽  
Claudionor Ribeiro Filho ◽  
Amador Villacorta ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Free Choice ◽  
Low Frequency ◽  
Field Evaluation ◽  
Choice Experiments ◽  
Coffee Berry ◽  
Coffee Berry Borer ◽  
Petri Dishes

The aim of this study was to evaluate the coffee germplasm of the Paraná Agronomic Institute (IAPAR) for resistance to the coffee-berry-borer. Preliminary field evaluation was performed in August 2004 and the fruits of less damaged genotypes in the field were evaluated under controlled condition with obligated and free choice experiments established in a randomized complete design with three replications. The genotypes were evaluated fifteen days after infestation with one borer per fruit in Petri dishes. The data were analyzed by the Scott-Knott means test at 1 % and by the χ2 test. Statistical analysis indicated that Coffea kapakata, Psilanthus bengalensis, C. eugenioides and genotypes with C. eugenioides genes were resistant. These genotypes presented low frequency of bored grains. C. eugenioides and C. kapakata could present resistance at epicarp level but not in the grain. P. bengalensis could present resistance also in the grains.

Prime Proportion Affects Masked Priming of Fixed and Free-Choice Responses

2010 ◽  
Vol 57 (5) ◽  
pp. 360-366 ◽  
Author(s):  
Glen E. Bodner ◽  
Rehman Mulji
Keyword(s):  
Decision Process ◽  
Free Choice ◽  
Masked Priming ◽  
Local Context ◽  
Previous Trial ◽  
Target Response ◽  
Global Context ◽  
Sequential Trial

Left/right “fixed” responses to arrow targets are influenced by whether a masked arrow prime is congruent or incongruent with the required target response. Left/right “free-choice” responses on trials with ambiguous targets that are mixed among fixed trials are also influenced by masked arrow primes. We show that the magnitude of masked priming of both fixed and free-choice responses is greater when the proportion of fixed trials with congruent primes is .8 rather than .2. Unconscious manipulation of context can thus influence both fixed and free choices. Sequential trial analyses revealed that these effects of the overall prime context on fixed and free-choice priming can be modulated by the local context (i.e., the nature of the previous trial). Our results support accounts of masked priming that posit a memory-recruitment, activation, or decision process that is sensitive to aspects of both the local and global context.

Investigating Choice Experiments Capability measure for Adults--Danish Version

2020 ◽  
Author(s):  
Annette Willemoes Holst‐Kristensen ◽  
Kirsten Fonager ◽  
Kjeld Møller Pedersen
Keyword(s):  
Choice Experiments ◽  
Danish Version
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