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Search Results: 1 - 5 of 5 matches for " Bentancourt "
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Morphology and biology of Porphyrosela minuta Clarke 1953 (Lepidoptera: Gracillariidae, Lithocolletinae) in Uruguay
Bentancourt, Carlos M.;Scatoni, Iris B.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000400005
Abstract: porphyrosela minuta clarke is a gracillariid that causes damage on white clover (trifolium repens) in uruguay. in this article, the eggs, all the larval instars, the pupa and the external morphological characteristics of the adult are described. information about the insect's biology under laboratory and field conditions is presented. the eggs are laid singly on the upper surface of the leaflets. the larvae make extensive mines that appear as white blotches. the larvae develop through five instars and do not remain exposed during their development. at 25oc the life cycle lasted 16.2 days, made up of 3.0 for eggs, 8.8 for larvae and 4.4 for pupae. females began laying on the first night, and during an oviposition period that varied between five and 12 days deposited an average of 71.8 eggs. it is a multivoltine species and seven to nine generations occur between november and the end of march.
Biología de Mallocephala deserticola Berg (Lepidoptera: Arctiidae)
Bentancourt, Carlos M.;Scatoni, Iris B.;
Anais da Sociedade Entomológica do Brasil , 1998, DOI: 10.1590/S0301-80591998000200007
Abstract: the biology of mallocephala deserticola berg was studied under laboratory conditions at 25±1oc, 75±10% rh and 16 hours of light. females began oviposition in the course of 24 hours from emergence. they laid most of their eggs in the first 36 hours. the eggs were laid in masses and the mean number of eggs deposited/female was 457; 23.1% of the females did not oviposit or laid infertile eggs. virgin females deposited less eggs, and their preovipositional period was longer than mated ones. the sexual ratio was 1.7 females for each male. the adults, were dimorphic, did not feed and lived 6.5 d. eggs hatched 6.9 d after oviposition, and their viability was 89.7%. larval period ranged from 33.1 to 41.1 d according to the number of instars, six or seven, respectively. mortality did not occur in the 1st larval instar, and in the absence of food, larvae lived 8 d. the larval viability was 94.5%. the prepupal period lasted 2 d and the viability was 98.2%. in the pupal stage sexual dimorphism was evident. pupal period lasted 11.4 and 8.0 d for males and females, respectively, and the viability was 97.2%. from egg to adult emergence, developmental time ranged from 52.0 to 59.8 d according to the number of larval instars.
Biology of Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) on seven natural foods
Bentancourt, Carlos M.;Scatoni, Iris B.;Gonzalez, Alvaro;Franco, Jorge;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000300004
Abstract: the effect of seven natural diets on the development and reproduction of bonagota cranaodes (meyrick) was evaluated under laboratory conditions. the experiments were carried out at the temperature of 23 ± 1oc, with 70 ± 10% of rh and a photoperiod of 16:8h (l:d). the larvae were reared on apple, grapevine and honeysuckle (lonicera japonica). on the first two foods three types of diet were used: spring leaves, summer leaves and fruits. the number of instars varied from five to seven. the larvae reared on apple leaves had, in general, fewer instars than those reared on grapevine and honeysuckle leaves. the duration of larval development differed between diets. the larvae reared on spring apple leaves showed the shortest duration, and those on fruit the longest. the larvae survival was lower on fruit than on leaves, and on apples it was particularly low (17.8%). the female pupae reared on honeysuckle were heavier than those reared on the other diets. the cycle from the egg to the emergence of adults varied between 41 days on spring apple leaves and 60 days on apples. the females reared on honeysuckle and spring apple leaves were the most fecund, whereas the females on apples did not oviposit. honeysuckle and spring leaves were the most suitable foods. apples, on the other hand, were the least suitable diet, which leads one to think that larvae could hardly complete their whole cycle on this fruit.
Effects of larval diet on the development and reproduction of Argyrotaenia sphaleropa (Meyrick) (Lepidoptera: Tortricidae)
Bentancourt, Carlos M.;Scatoni, Iris B.;Gonzalez, Alvaro;Franco, Jorge;
Neotropical Entomology , 2003, DOI: 10.1590/S1519-566X2003000400004
Abstract: the effect of six natural diets on the development and reproduction of argyrotaenia sphaleropa (meyrick) was measured under laboratory conditions, at 23 ±1oc temperature, 70 ± 10% rh, and photoperiod of 16l:8d. larvae were reared on three types of diet (spring leaves, summer leaves and fruits) from two different host plants (apple tree and grapevine). larval development, number of instars, survival, weight of pupae, fecundity, and fertility varied as a function of diets. the shortest time span of larval development, the greatest pupal weight, and the greatest adult fecundity and fertility was observed on insects feeding on spring apple leaves. the duration of larval development was longer on fruits than on leaves. the lowest larval survival occurred on apple fruits. larvae with a higher number of instars generally had an increase in the time span of larval development. larval development time span (4 out of 6 treatments) as well as pupal development time span (5 out of 6 treatments) was sex dependant. on all diets the females deposited the highest number of eggs on the first day of oviposition. the results obtained reinforce the hypothesis that the larvae of a. sphaleropa first feed on both apple and grapevine leaves, and then move to the fruits, where they cause serious damage.
Neotropical Ichthyology: trajectory and bibliometric index (2003 - 2010)
Stumpf, Ida Regina Chitto;Vanz, Samile Andrea de Souza;Gastaud, Natália;Vargas, Rosely;Bentancourt, Silvia Maria Puentes;
Neotropical Ichthyology , 2011, DOI: 10.1590/S1679-62252011005000050
Abstract: the neotropical ichthyology journal was created in 2003 and soon became one of the main publications in its field as it is reflected in the number of articles submitted every year and the fact that it has been indexed by both scielo and isi. in order to understand the reasons for its trajectory, the journal history was recovered and bibliometric indices on author, citation and impact factor were mapped for the period between 2003 and 2010. a descriptive study on journal information source and a bibliometric study of the 388 articles published by the journal and the 642 articles that cite it have been carried out. bibliometric analyses showed that 75.8% of the articles had been written by brazilian authors and 91.3% had been published in collaboration. the journal was cited by 171 different publications from 28 countries, including renowned journals in the field. self-citation accounted for 26.8% of journal citation. analyses have been able to show that strict evaluation control and editing of the articles have contributed towards its success and internationalization.
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