scholarly journals EFFECT OF AGE OF EGGS Mocis latipes (Lepidoptera, NOCTUIDAE) ON parasitism of Trichogramma pretiosum (Hymenoptera, Trichogrammatidae) WITH DIFFERENT AGES

Nucleus ◽  
2013 ◽  
Vol 10 (2) ◽  
pp. 265-274 ◽  
Author(s):  
Priscila Stinguel
Keyword(s):  
Trichogramma Pretiosum ◽  
Different Ages ◽  
Mocis Latipes ◽  
Lepidoptera Noctuidae ◽  
Effect Of Age

scholarly journals Biological parameters of three Trichogramma pretiosum strains (Riley, 1879) (Hymenoptera: Trichogrammatidae) on eggs Helicoverpa armigera (Hübner, 1805) (Lepidoptera: Noctuidae)

2017 ◽  
Vol 39 (3) ◽  
pp. 349 ◽  
Author(s):  
Gabriel dos Santos Carvalho ◽  
Luciana Barbosa Silva ◽  
Maisa Sousa Veras ◽  
Eliane Carneiro Bueno dos Santos ◽  
Mayra Layra dos Santos Almeida ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Biological Parameters ◽  
Trichogramma Pretiosum ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae

scholarly journals Performance of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) on eggs of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Valéria Lucas Laurentis ◽  
Dagmara Gomes Ramalho ◽  
Nathália Alves Santos ◽  
Vanessa Fabíola Pereira Carvalho ◽  
Alessandra Marieli Vacari ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Trichogramma Pretiosum ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae ◽  
Helicoverpa Armigera Hubner

Effects of egg load on the host-selection behaviour of Helicoverpa armigera (HÜbner) (Lepidoptera : Noctuidae)

1998 ◽  
Vol 46 (3) ◽  
pp. 291 ◽  
Author(s):  
Mustapha F. A. Jallow ◽  
Myron P. Zalucki
Keyword(s):  
Host Plant ◽  
Helicoverpa Armigera ◽  
Physiological State ◽  
Egg Load ◽  
Host Plant Selection ◽  
Plant Selection ◽  
Helicoverpa Armígera ◽  
Host Plant Specificity ◽  
Lepidoptera Noctuidae ◽  
Effect Of Age

We examined the effect of age-specific fecundity, mated status, and egg load on host-plant selection by Helicoverpa armigera under laboratory conditions. The physiological state of a female moth (number of mature eggs produced) greatly influences her host-plant specificity and propensity to oviposit (oviposition motivation). Female moths were less discriminating against cowpea (a low-ranked host) relative to maize (a high-ranked host) as egg load increased. Similarly, increased egg load led to a greater propensity to oviposit on both cowpea and maize. Distribution of oviposition with age of mated females peaked shortly after mating and declined steadily thereafter until death. Most mated females (88%) carried only a single spermat-ophore, a few females (12%) contained two. The significance of these findings in relation to host-plant selection by H. armigera, and its management, are discussed.

scholarly journals The Effect of Age in the Shape of the Spermatozoa Frozen Friesian Bulls

2018 ◽  
Vol 26 (10) ◽  
pp. 36-40
Author(s):  
Makki Khalaf Hussain Al-Dulaimi
Keyword(s):  
Artificial Insemination ◽  
The Other ◽  
Form Of Life ◽  
The Third ◽  
Normal Sperm ◽  
Different Ages ◽  
Effect Of Age

This study was aimed to determine whether there are any differences in the shape and dimensions of bulls sperm using different ages, as well as to know the maturity of the sperm, then choose the bull for insemination or to freeze the taken semen to be used in artificial insemination. Now a day become morphology shape for sperm important item in the valuation of the semen and chose the best normal sperm whence dimension and shape. Methods were used and bulls were classified by age into three groups, the first group includes 4 bulls aged 2-4 years, the second group includes 4 bulls 4-6 years old, the third group includes 4 bulls 6-8 years old. Semen of each group was taken randomly and the mature and intact semen were examined. The results were revealed that the highest value of head’s length (6-8 years category) was (8.20), while for 4-2 years category was the least (7.81). For the width, the third category was recorded the highest (4.51) along with the other. The Ellipticity inducts that 4-2 years group was the highest value (1.85), while for elongation character the 2-4 years group was the highest with (0.3) compared with the other.           It can be concluded our study in the current to the next score whenever the bull offers in the form of life has become the best sperm beltala can choose sperm in the freezer.

scholarly journals Egg Parasitoids Survey of Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) in Maize and Sorghum in Central Mexico

Insects ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 157 ◽  
Author(s):  
Jannet Jaraleño-Teniente ◽  
J. Refugio Lomeli-Flores ◽  
Esteban Rodríguez-Leyva ◽  
Rafael Bujanos-Muñiz ◽  
Susana E. Rodríguez-Rodríguez
Keyword(s):  
Natural Enemies ◽  
Spodoptera Frugiperda ◽  
Egg Parasitoid ◽  
Egg Parasitoids ◽  
Invasive Pest ◽  
Trichogramma Pretiosum ◽  
Field Surveys ◽  
Control Programs ◽  
Lepidoptera Noctuidae ◽  
Chelonus Insularis

Spodoptera frugiperda (Smith) is the main maize pest in America and was recently detected as an invasive pest in some countries in Asia and Africa. Among its natural enemies presented in Mexico, Trichogramma pretiosum Riley is the only egg parasitoid used in Integrated Pest Management (IPM) programs regardless of its effectiveness. A search for natural enemies of S. frugiperda was then carried out to determine whether this parasitoid has been established, and to detect native egg parasitoids or predators associated with this pest. The sentinel technique (egg masses) was used, and then placed in maize and sorghum fields in the state of Guanajuato, Mexico. Trichogramma atopovirilia Oatman and Platner, an egg parasitoid, and Chelonus insularis Cresson egg-larva parasitoid were recovered from field surveys. Among the natural enemies that preyed on eggs of S. frugiperda, we found mites of the genus Balaustium, and Dermaptera of the genus Doru, both species in great abundance. Laboratory tests were performed to compare the potential parasitism of T. atopovirilia against T. pretiosum. T. atopovirilia obtained 70.14% parasitism while T. pretiosum, 29.23%. In field cages, three doses of the parasitoids were tested. Total parasitism did not exceed 8% in any of the two species, but T. atopovirilia parasitized a greater number of hosts using two and three parasitoids per pest egg. Then, the use of Trichogramma species needs to be reevaluated in biological control programs against S. frugiperda.

scholarly journals Avaliação do comportamento reprodutivo e do feromônio sexual sintético de Mocis latipes (Guenée) (Lepidoptera: Noctuidae)

1998 ◽  
Vol 27 (1) ◽  
pp. 9-20 ◽  
Author(s):  
Eraldo R. Lima ◽  
Evaldo F. Vilela ◽  
Germán R. Sanchez
Keyword(s):  
Anticarsia Gemmatalis ◽  
Mocis Latipes ◽  
Lepidoptera Noctuidae

Durante a escotofase, fêmeas de Mocis latipes (Guenée) pousaram em superfícies verticais e iniciaram o comportamento de chamamento aos machos, abaixando levemente as asas, levantando o final do abdômen e protraindo o ovipositor. As fêmeas começaram a chamar a partir do 2º dia de idade, sendo o pico de chamamento no 4º dia. O início do chamamento aconteceu na 2ª hora da escotofase e o máximo de indivíduos chamando aconteceu na 3ªhora. As proporções entre os componentes (Z,Z,Z)-3,6,9-heneicosatrieno e o (Z,Z)-6,9-heneicosadieno de 70:30 e 60:40 mostraram ser as mais atrativas aos machos de M. latipes em túnel-de-vento. Os machos iniciaram a resposta às fêmeas 24 h após a emergência, na 3ª hora da escotofase. São descritas as seqüências de corte e cópula e apresentada uma análise comparativa do comportamento reprodutivo de M. latipes e Anticarsia gemmatalis (Hübner).

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