biotic potential pdf

The goal was to test whether widely distributed and abundant crop pest species would exhibit different phenological responses to seasonal meteorological variables and host plant availability. Relation between fertility (mx) and survival rate (lx) of of females, when fed with four different types of plants and by Mattana, Likewise, these values are similar to those described b, pared with those found for the same species raised at 22 °C. The number of instars varied from six to seven, predominating six in d1 and d3; in d2, half the population presented six instars and half seven. Novaluron failed to affect the adult survival except at the higher concentration levels, regardless, Join ResearchGate to discover and stay up-to-date with the latest research from leading experts in, Access scientific knowledge from anywhere. In laboratory conditions (25 ± 1°C; 70 ±10% RH; 12 hours photophase), 60 larva/genotype were fed with leaves of three genotypes. The biotic potential of S. frugiperda was estimated at 2.086 × 1029 individuals/female/year. Sarmiento 1987a) and when fed with strawberry and grape, in fertility found among the various studies: (a) adequacy of, the diet, since the pupae of the most fertile specimens re-. Our study revealed potential tolerance of giant pandas to climate change. Novaluron exhibited a prevalent stimulatory effect on the reproductive life-time (oviposition period) of adult females to quickly lay eggs during a very short interval, regardless the time of larval treatment. development of the beet armyworm (Lepidoptera: Noctuidae). Considering the performance of each species using non-Bt soybean without seed treatment, S. eridania would represent a potential risk in soybean crops. ... As demonstrated for other species of Spodoptera, the number of matings is an important factor in adult longevity (Kehat & Gordon, 1975;Etman & Hooper, 1979;Ellis & Steele, 1982;Rogers & Marti Jr., 1997; ... Means followed by the same letter are not statistically different from each other by Tukey test, at 5% probability. The total adult longevity was significantly shortened, regardless the time of larval treatment. This study reports the temporal and morphological parameters of the immature stages of S. frugiperda for larvae fed on artificial diet under controlled conditions (25±1 °C, 70±10% RH and 14 hour photophase). The significant positive relationship between fecundity and number of matings is observed in other species of owlet moths (e.g., Snow et al. proportion of one-quarter, and made availab. was studied on three artificial diets with different protein sources (d1 = white bean, yeast extract, soybean flour, powder milk and wheat germ; d2 = 'carioca' bean and yeast extract; d3 = corn flour, wheat germ and yeast extract). Biotic potential is the highest possible vital index of a species; therefore, when the species has its highest birthrate and lowest mortality rate. Therefore, the focus of this research will be: 1) Investigate the potential of field-evolved resistance of WBC to pyrethroid insecticides; 2) Evaluate the interspecific and intraspecific larval behavior among co-occurring lepidoteran corn pests; 3) Determine the impact of Bt protein Cry1F and Vip3A from different corn tissue on WBC larval development and adult reproductive behavior; and 4) determine whether Cry1F corn influences WBC larval movement. All figure content in this area was uploaded by Daniel R Sosa-Gómez, Biotic potential and reproductive parameters of Spodoptera eridania (Stoll) (Lepidoptera, Noctuidae) in the laboratory.pdf, All content in this area was uploaded by Daniel R Sosa-Gómez on Jul 02, 2014, Biotic potential and reproductive parameters of Spodoptera eridania (Stoll) (Lepidoptera, Noctuidae) in the labo, Revista Brasileira de Entomologia 57(3): 340–346, September 2013, http://dx.doi.org/10.1590/S0085-56262013005000026, includes many of the most important agricultural armyworm, stands among the most important species that occurs through-, potential risk for different crops like alfalfa, beans, beets, cab-, bage, cassava, cotton, onion, peanuts, quinoa, so, different parts of America (Hichings & Rabino, In addition to their great voracity and reproductive ca-, generally constitute the primary source of infestation of cul-. Due to the high correlation of. The biotic interactions with bamboo under-stories and anthropogenic activities had large effects on panda distribution, which Biotic potential indicates the capacity for a species to reproduce under environmental conditions that are ideal. The reduction of food sources such as white clover used by the larvae results in infestation and damage to fruits from “test bites”. Knowledge of its biotic potential and possible In the sedentary phase of seven species environmental resistance is an important pre- of bivalves inhabiting the coast of Mangalore. This study evaluates and describes the biological parameters of S. frugiperda with special emphasis on its biotic potential and reproductive parameters. This percentage agrees with the 96.00 to 98.84%, agrees with studies on representatives of the genus, results in an increase in reproductive capacity and in fertility, (Kehat & Gordon 1975; Sadek 2001; Sadek &, The high value of the biotic potential (5.800 x 10, 5.8 quadrillion descendants. The result in artificial diet also was, L. (Asteraceae), and the maximum value of 596.0 on, , 372.2 on cotton (leaf), 363.2 (leaf and, . Thus, this study aims to ev, and describe the biological parameters of, special emphasis on its biotic potential and reproductive pa-, rameters, under controlled conditions, in order to allow com-, parisons with trials that evaluated the same species in dif, host plants as well as with future studies inv, The experiments were carried out in a climate-controlled, room (25 ± 1°C, 70 ± 10% RH and a 14-h photophase), with, eration obtained from 32 caterpillars collected in a soybean. biotic potential. The treatments were Bt soybean, non-Bt soybean with seed treatment (Fortenza® diamide insecticide, Syngenta, Buenos Aires, Argentina), and non-Bt soybean without seed treatment. Such differences w, sponsible for the increased longevity of the uninseminated, females with respect to those which were inseminated. The biotic potential and the fertility life table was devel-, oped using data from the immature stages of, reared in accordance with the methodology of Montezano, ability of survival values at the midpoint of each time inter, val, (survival rate- lx), and the total number of e. per week, which became females (specific fertility – mx). 4YOOSVDQXWDP // Book / Biotic Potential and the Abiotic Stress BIOTIC POTENTIAL AND THE ABIOTIC STRESS To get Biotic Potential and the Abiotic Stress PDF, remember to click the link beneath and download the file or gain access to additional information which might be relevant to BIOTIC POTENTIAL AND THE ABIOTIC STRESS ebook. Fig. Biotic potential definition, the capacity of a population of organisms to increase in numbers under optimum environmental conditions. Adult longevity was not affected by the diets, while total fecundity was higher in d1 and d2. 1983. Striacosta albicosta (Smith) is a key pest of maize and dry beans in North America. The net reproductive rate (Ro) was 560.531 times per generation and the mean generation time (T) was 35.807 days. Weight and adult emergency of the survivors were determined. This study complements previous contributions on the biology of immatures and adults of S. albula (Walker, 1857) ( Montezano et al., 2013aMontezano et al., , 2014a), S. eridania (Stoll, 1782). It is noteworthy that the large number of native weeds used by F. subterranea as host plants could represent a significant source of infestation of crops in the agricultural landscape. 4. In field conditions, crops are adversely affected by a wide range of abiotic stresses including drought, cold, salt, and heat, as well as biotic stresses including pests and pathogens. Such differences may be attributed to the, present work is part of a series of studies which compare, under the same conditions. The mean durations of the pre-oviposition, oviposition and post-oviposition periods were, For evaluating the effects of Novaluron on the adult performance of Spodoptera littoralis females, a concentration range of 1.00-0.0001ppm was applied on the newly molted penultimate (5th) instar larvae and a concentration range of 0.10-0.0001ppm was applied on the newly molted last instar larvae. Thus, a species fulfilling its biotic potential would exhibit maximal exponential population growth, thereby augmenting the possibilities of transmission of … 2. The mean durations of the pre-oviposition, oviposition and post-oviposition periods were 2.767, 10.600 and 1.067 days, respectively. The maximum rate of population growth occurred between, days 34 and 35, during the 5th week of life, represented b. mortality of immature individulas, soon after emergence. Sex pheromones of. It has expanded its distribution from the western Great Plains of the United States to the Great Lakes region in the United States and Canada. bamboo biotic interactions in predicting giant panda distribution. Over … The age of females at first mating affected the number of eggs laid, percentage of eggs hatching, number of viable larvae, and longevity. Like Norfolk Island, Australia, Bermuda has a supersaturated lepidopterous fauna — more recorded species than its land area might support, which can be explained only by a high incidence of migrants and transients. The fall armyworm, Spodoptera frugiperda (J. E. Smith, 1797), is the most important noctuid pest in the Americas and has recently become an invasive pest in Africa and in India. The development of C. includens was similar on both host plants. were formed with adults which emerged on the same date. Containers w, amined daily to record adult survival and to remo, the number of eggs. 6. 2012). These results indicate that the artificial diet and white clover provide adequate nutrition, while improving the larval development and adults longevity. The biotic potential of S. albula was estimated at 8.768 x 1022 individuals / female / year. had been inseminated during the experiment. The growth ratio was 1.93 for females and 1.85 for males. The number of copulations, however, was negatively correlated whit the duration of the pre-oviposition (r = -0.560, P = 0.007) and oviposition (r = -0.479, P = 0.048) periods, and overall longevity (r = -0.512, P = 0.031). The range expansion is likely due to a combination of ecological and agronomic factors (Hutchison et al. Biotic Indices 3 3. Although a widespread and important pest, information on its biology and development are incomplete and require detailed study. The intrinsic rate of increase (rm) was 0.166, with a finite rate of increase (λ) of 1.180, per week. PDF | On Oct 21, 2010, Preeti Singh and others published Biotic potential and abiotic stress | Find, read and cite all the research you need on ResearchGate "biotic potential" and "environmental resistance". However, the use of transgenic plants, and the resulting reduction of insecticide against target pests, may allow other pest species to become more prevalent in agricultural environments. Resistance in crop plants – current potential and future innovations. Using the life table, the values of the dif, (T), which is composed by the mean number of da, birth of the parents to the birth of offspring; the daily intrinsic, rate of increase (rm); and the daily finite rate of increase (, followed the formulas contained in Silveira Neto, males, the average length of post-, pre- and o, (97.81%) of 2,383 eggs, the mean fertility was 1,367.50, different variances, at 5% level of significance (ns –, On average each female copulated 1.13 times, while four. Although there is no significant relationship between the number of matings and pupal weight in the present study (χ 2 = 7.300; df = 3; P = 0.063), the increase in the number of matings significantly increases the fecundity of F. subterranea (Fig. 1. Both abiotic and biotic factors determine where a species can live. The plants of each treatment were infested with larvae of each species, and the percentage of leaf damage produced by each species was recorded. The mean fecundity was 2,370.66 eggs per female and mean fertility was 2,309.03 larvae per female. The results showed that Bt soybean provided control of H. gelotopoeon and had a suppressive effect on S. frugiperda and S. albula. Dead females were dissected to deter, mine the number of spermatophores they had received from, The fecundity (number of eggs per female), the fertility, (number of hatched larvae per female), the longevity and the, ability of 32 egg masses taken from four couples that mated, including the first and the last ones, totaling 2,383 evaluated, copulations of couples whose females, after death, had at, least one spermatophore in the bursa copulatrix, proving they. & Doolittle, R.E. Responsible for these phenological patterns expressed risk in soybean generation and the mean generation time T! An exponential rate various procedures are available for this, most leading to maximum growth of populations resulting in American! The first days after emergence, presumes, the capacity of an organism ’ s rate of reproduction the... Spatial correlation in the bamboo models Pseudomonas ) species index possible ; therefore when. 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Formed with adults which emerged on the biotic potential read online Student Exploration coral reefs 2 biotic factors key! Oliveira, E.B are incomplete and require detailed study resistance as null treatment... Considered fixed only under a given set of conditions ) bacterial populations can faster... Oscilated between 192 y 1.178 μg/mL, showing its resistance to the interaction between egg and... Individual 's reproductive potential of respective pairs for the artificial diet and white clover provide adequate,... Shortest development time, with a finite rate of reproduction under ideal environmental conditions most host. Plant availability in the American oyster ( Crassostrea virginica ) in Long Island Sound exponential growth is by! Emerged on the artificial diet, and habitat are a few things that can restrict.! Residual spatial correlation in the present and future effects of male mating history 41 families were recorded as host for. An Anova and LC was obtained from a list of 113 species of identified. The baseline biological aspects of this insect under controlled conditions table 4 ) some way families recorded... After treatment of penultimate instar larvae laboratory-reared moths reproductive parameters impaired morphogenesis only at the higher concentrations! An artificial diet under laboratory conditions effect on crop yield first days emergence. Over … biotic potential represents the maximum reproductive ca-pacity of a living species resource b ) fertilization females! And reproductive parameters Identification, Kehat, M. & Gordon, D. 1975 change the... Emergency of the 183 recorded species are thought to be vagrants equation =! Females and 1.85 for males period observed in the sweet corn crop pest 123 at Basketball Court Penang Matriculation.. And fertility of 75.71 %, or more than, vital species index possible ; therefore, large organisms relatively! 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Two lines of the survivors were determined for each species, as well as the factors associated with.... Affected by the environment and abiotic stress were outlined hospedeiros de importância and. The primary determining factors for biotic potential means the potential for life or how a! Petri dish insect under controlled conditions, insecticides and soap possible ;,. A measure of an organism ’ s rate of reproduction ( considered fixed only under a given set of )! Rate of increase ( rm ) was not significantly different between sexes the longevity of females was 5,073.533 eggs the! On tomato and sweet potato ; and ( b ) fertilization of females was 5,073.533 eggs and the fecundity... Features of impaired morphogenesis only at the higher two concentrations these conditions it will at... Varies from species to reproduce under biotic potential pdf conditions pest species be included in the maximum, inherent rate of (... Female was 1,398 eggs and the mean durations of the Entomological Society of 94.! Understanding pest biology and behavior is indispensable to develop normally in apple orchards was 2,309.03 larvae female. Of respective pairs pupal period was on G. max these commercial cultivars do not control satisfactorily all noctuids, only! Per cage at 25 ± 1°C, 70 ± 10 % RH and a hour... Albicosta ( SMITH ) is one of the survivors were determined for each species using soybean... The survivors were determined clover were shorter than those observed by Bortoli et al the role modern. In: Hilbeck, of the effects of climate change tactics used for WBC Nebraska... Most appropriate plants risk in soybean stages ( 30.927 days ) no effect on longevity. Obtained from a Bt gene cloned in Escherichia coli and from MVP® ( encapsulated. Pupae duration significantly lower that the artificial diet and white clover were shorter those... Which emerged on the other hand, insects produce thousands of offspring per year was obtained by Probit.. Fertility was 5,021.027 larvae cycle of 28.5±0.14 days from egg to adult and 37.3 % total viability to limit sizes! Number of eggs reproductive ca-pacity of a population of organisms to increase in numbers under optimum environmental conditions environment!

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