Effect of temperature and host species on parasitism, development time and sex ratio of the egg parasitoid Trichogrammatoidea lutea Girault (Hymenoptera: Trichogrammatidae)

AbstractThe performance of the egg parasitoidUscana lariophagaSteffan was studied when reared on eggs of the bruchid storage pest,Callosobruchus maculatus(Fabricius) developing in seeds of cowpea, chickpea and pigeonpea. The beetle laid more and larger eggs on pigeonpea than on cowpea and chickpea, indicating that there was not a trade-off between number and size of the eggs. The bruchid larvae reared on pigeonpea exhibited a longer development time and a higher mortality than those reared on cowpea and chickpea. The resulting males weighed less than those reared on cowpea and chickpea. The trichogrammatidU. lariophagaparasitized more eggs whenC. maculatuswas reared on chickpea than when reared on the other hosts. Parasitoid larvae developed slowest and had the highest mortality in eggs ofC. maculatusreared on pigeonpea compared to those reared on cowpea and chickpea; the sex ratio (% of females) of the resulting adults was also higher. The high mortality and long development time ofC. maculatusreared on pigeonpea indicated that this legume was less favourable toC. maculatusthan chickpea or cowpea. This was probably also true for the parasitoid since the mortality was higher and development longer in eggs ofC. maculatusreared on pigeonpea compared to those reared on cowpea and chickpea. Therefore, when host eggs were larger and of lower nutritional quality, the proportion of female egg parasitoids was greater.

Download Full-text

EFFECT OF TEMPERATURE, PHOTOPERIOD, BIOLOGICAL AND CHEMICAL FACTORS OF THREE HOST SPECIES ON THE PERFORMANCE OF THE EGG PARASITOID Trichogramma evanescens WEST.

Journal of Plant Protection and Pathology ◽

10.21608/jppp.2013.87484 ◽

2013 ◽

Vol 4 (9) ◽

pp. 781-793

Author(s):

M. Metwally ◽

M. El-Kordy ◽

H. Mohamed ◽

A. El-Sebai ◽

A. Atta

Keyword(s):

Host Species ◽

Egg Parasitoid ◽

Effect Of Temperature ◽

Trichogramma Evanescens ◽

Chemical Factors

Download Full-text

Effect of Temperature and Host on the Development, Sex Ratio, Emergence Rate and Body Size of Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae), an Egg Parasitoid of the Tea Tortrix

Japanese Journal of Applied Entomology and Zoology ◽

10.1303/jjaez.2008.193 ◽

2008 ◽

Vol 52 (4) ◽

pp. 193-200

Author(s):

Chikara Ishijima ◽

Yasushi Sato ◽

Makoto Ohtaishi

Keyword(s):

Body Size ◽

Sex Ratio ◽

Egg Parasitoid ◽

Effect Of Temperature ◽

Emergence Rate ◽

Trichogramma Dendrolimi

Download Full-text

Occurence and biological aspects of the clitoria tree psyllid in Brazil

Scientia Agricola ◽

10.1590/s0103-90162005000300012 ◽

2005 ◽

Vol 62 (3) ◽

pp. 281-285 ◽

Cited By ~ 5

Author(s):

Manoel Guedes Corrêa Gondim Junior ◽

Reginaldo Barros ◽

Fernando Rodrigues da Silva ◽

Geraldo José Nascimento de Vasconcelos

Keyword(s):

Sex Ratio ◽

Incubation Period ◽

Development Time ◽

Metropolitan Areas ◽

Immature Stage ◽

Frequency Curve ◽

Nymphal Stage ◽

Female Longevity ◽

Biological Aspects

Clitoria fairchildiana (Howard) is a tree largely distributed in Brazil, used for urban arborization. In April 2001, the psyllid Euphalerus clitoriae Burckhardt & Guajará was reported on this plant in the metropolitan areas of Recife, PE, Brazil. This report records the occurrence of E. clitoriae and studies some of its biological aspects in this area. With this purpose, C. fairchildiana leaves were sampled weekly, and E. clitoriae nymphs as well as Aprostocetus sp. larvae and nymphs were collected and counted. The E. clitoriae population ranged from 2 to 90 nymphs per leaflet. The Aprostocetus sp. percentage of parasitism ranged from 3 to 24%. The frequency curve for pygidium width ranged from 120 to 140; 200 to 240; 300 to 380; 460 to 580, and 720 to 820 mm for the first, second, third, fourth, and fifth instars, respectively. The incubation period for E. clitoriae eggs lasted 7.6 days. The nymphal stage lasted 5.7; 4.5; 4.8; 5.0, and 6.1 days for the first, second, third, fourth, and fifth instars, respectively. Development time from egg to adult was 33.7 days. Female longevity 8.6 days, with a daily fecundity of 118 eggs. The total viability of the immature stage was 74%, and the sex ratio was 0.5.

Download Full-text

Nesting Biology of Podium angustifrons Kohl (Hymenoptera, Sphecidae) in an Araucaria Forest Fragment

Brazilian Journal of Biology ◽

10.1590/1519-6984.19112 ◽

2014 ◽

Vol 74 (2) ◽

pp. 493-500

Author(s):

MLT. Buschini ◽

CE. Buss

Keyword(s):

Life History ◽

Sex Ratio ◽

Wild Species ◽

Development Time ◽

Forest Fragment ◽

Nesting Biology ◽

Araucaria Forest ◽

Trap Nests ◽

French Guyana ◽

Coated Surfaces

Podium angustifrons Kohl 1902 is a species of solitary wasp which nests in pre-existing cavities, with neotropical distribution in Argentina, Bolivia, Brazil, Colombia, Guyana and French Guyana. The aim of this study was to investigate the nesting biology of P. angustifrons, discussing aspects of their life history. To capture its nests, wooden trap-nests were installed in the Parque Municipal das Araucárias, Guarapuava (PR), Brazil, from January 2003 to April 2009. A total of 29 nests were collected, all during the warmer months. These showed no vestibular and intercalary cells, and their closures were made up of chewed plants and mud mixed with organic materials and resin-coated surfaces, sometimes showing a layer of lichens. The cells were provisioned with various wild species of cockroaches (Chorisoneura sp, Riata sp and Helgaia sp) in the nymph stage and/or adults. The sex ratio was 4.6 females per male, significantly higher that the expected 1:1. Most pre-pupae entered diapause in winter with development time ranging from 187 to 283 days for females and 180 to 283 days for males. Deaths occurred in 41.66% of cells provisioned, 33.33% were attributed to faulty development and 8.33% to Chrysididae.

Download Full-text