Development and Host-age Preference of Gryon philippinense (Hymenoptera: Scelionidae), a Solitary Egg Parasitoid of the Winter Cherry Bug Acanthocoris sordidus (Hemiptera: Coreidae)

2004 ◽  
Vol 8 (1) ◽  
pp. 34-39 ◽  
Author(s):  
Anabelle O. Dasilao . ◽  
Ryo Arakawa .
Keyword(s):  
Egg Parasitoid ◽  
Host Age ◽  
Acanthocoris Sordidus

PARASITISM OF LEPTINOTARSA DECEMLINEATA (SAY) EGGS BY EDOVUM PUTTLERI GRISSELL (HYMENOPTERA: EULOPHIDAE): EFFECTS OF HOST AGE, PARASITOID AGE, AND TEMPERATURE

1987 ◽  
Vol 119 (1) ◽  
pp. 75-82 ◽  
Author(s):  
J. Lashomb ◽  
D. Krainacker ◽  
R.K. Jansson ◽  
Y.S. Ng ◽  
R. Chianese
Keyword(s):  
Leptinotarsa Decemlineata ◽  
Total Mortality ◽  
Egg Parasitoid ◽  
Host Age ◽  
Edovum Puttleri ◽  
Age Classes ◽  
Preoviposition Period ◽  
Potato Beetle ◽  
Leptinotarsa Decemlineata Say ◽  
Parasitoid Age

AbstractParasitism of the Colorado potato beetle, Leptinotarsa decemlineata (Say), by Edovum puttleri Grissell, an exotic egg parasitoid, was studied in relation to the age of host eggs, the age of adult, female parasitoids, and temperature. Parasitism was greater in eggs ≤2 days old than in eggs older than 2 days. Eggs older than 2 days were killed primarily by probing and consequent desiccation. The percentage of eggs killed by probing was positively correlated with host age and negatively correlated with percentage parasitism. Total mortality of eggs from parasitism and probing did not differ among age classes. Following a 3-day preoviposition period, parasitism and probing increased with an increase in the age of females, peaked when adults were ca. 13 days old, and subsequently declined. Parasitism and probing were influenced by temperature: at 15 °C, no parasitism or probing was observed; above 15 °C, mortality from parasitism and probing increased with an increase in temperature up to 30 °C; above 30 °C, the number of eggs that were parasitized and probed decreased with an increase in temperature.

Uscana lariophaga (Hymenoptera: Trichogrammatidae), an egg parasitoid of bruchid beetle (Coleoptera: Bruchidae) storage pests in West Africa: host-age and host-species selection

1991 ◽  
Vol 81 (1) ◽  
pp. 65-76 ◽  
Author(s):  
A. van Huis ◽  
M. G. Wijkamp ◽  
P. M. Lammers ◽  
C. G. M. Klein Goldewijk ◽  
J. H. van Seeters ◽  
...  
Keyword(s):  
West Africa ◽  
Host Species ◽  
Insect Pests ◽  
Egg Parasitoid ◽  
Species Selection ◽  
Choice Situation ◽  
Host Age ◽  
Storage Pests ◽  
Parasitization Rate ◽  
The Difference

AbstractUscana lariophaga Steffan is an egg parasitoid of bruchid species in West Africa. The hosts are Callosobrucbus maculatus (Fabricius) and Bruchidius atrolineatus Pic, insect pests of stored cowpea. Experiments were carried out to study the selection between hosts of different ages and of different species in choice and no-choice situations. Results were obtained through parasitization studies and by direct behavioural observations. A description of the parasitization behaviour of Uscana lariophaga is given. At 30°C, C. maculatus eggs of 0–2 day old are readily accepted for parasitization, but in a choice situation the 0 day old eggs are preferred. Of the older eggs only those of 3 days old are parasitized but significantly less than those of 0–2 days. At 30°C, B. atrolineatus eggs older than 24 hours are significantly less parasitized than younger eggs also in the no-choice situation. When eggs are older than one day, the time needed for penetrating the egg increases with host age. Both bruchid species are suitable hosts for U. lariophaga. In a choice situation B. atrolineatus is the preferred host and especially so when U. lariophaga has been reared on this species. However, in a no-choice situation the highest rate of successful parasitization is obtained on hosts of the species from which they have been reared. The higher parasitization rate of C. maculatus in the field in Niger can be explained by the difference in the susceptible period between the two host species.

Influence of Host Age on Patch Use by a Quasi-Gregarious Egg Parasitoid

2003 ◽  
Vol 32 (4) ◽  
pp. 789-796 ◽  
Author(s):  
Yoshimi Hirose ◽  
Lester E. Ehler ◽  
Yasuko Hirose
Keyword(s):  
Egg Parasitoid ◽  
Host Age ◽  
Patch Use
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