Abstract
Aspects of the biology of the adult stage of Ufens principalis Owen (Hymenoptera: Trichogrammatidae), an important parasitoid of Homalodisca (Hemiptera: Cicadellidae) eggs in southern California, were studied. The field-based sex ratio of U. principalis was significantly different from 1:1 and was female biased (62% females). Females and males did not differ significantly in size based on measurements of head width and hind tibia length, and these two variables were highly correlated. There was a significant effect of female age on egg load. Females aged 1, 4, and 5 d had significantly higher egg loads than freshly emerged females. There was also a significant positive linear relationship between egg load and hind tibia length. Egg load averaged 37.9 ± 1.1 eggs. Eggs, which measured 207.8 ± 12.2 m in length, were elliptical with an anterior nipple-shaped constriction. The longevity of adults was significantly affected by temperature and food (1:1, honey/water). Food had a greater effect in prolonging life as temperature decreased from 35.0 to 10.0°C. The most long-lived adults were fed on honey and kept at 10.0°C (20.2 ± 3.3 d). The rate of parasitism was significantly affected by host age, being significantly higher for 0-h-old eggs than for 12-24-h-old host eggs. There was no significant difference in parasitism between 0-h-and 0-6-h-old eggs and between 06 and 12-24-h-old eggs.
| Original language | English |
|---|---|
| Pages (from-to) | 236-246 |
| Number of pages | 11 |
| Journal | Annals of the Entomological Society of America |
| Volume | 103 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Mar 2010 |
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Keywords
- Biological control
- Glassy-winged sharpshooter
- Homalodisca liturata
- Morphometrics
- Sex ratio
ASJC Scopus subject areas
- Insect Science
Cite this
Biology of the adult stage of Ufens principalis (Hymenoptera : Trichogrammatidae), an egg parasitoid of Homalodisca spp. (Hemiptera: Cicadellidae) in Southern California. / Al-Wahaibi, Ali K.; Morse, Joseph G.
In: Annals of the Entomological Society of America, Vol. 103, No. 2, 03.2010, p. 236-246.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Biology of the adult stage of Ufens principalis (Hymenoptera
T2 - Trichogrammatidae), an egg parasitoid of Homalodisca spp. (Hemiptera: Cicadellidae) in Southern California
AU - Al-Wahaibi, Ali K.
AU - Morse, Joseph G.
PY - 2010/3
Y1 - 2010/3
N2 - Aspects of the biology of the adult stage of Ufens principalis Owen (Hymenoptera: Trichogrammatidae), an important parasitoid of Homalodisca (Hemiptera: Cicadellidae) eggs in southern California, were studied. The field-based sex ratio of U. principalis was significantly different from 1:1 and was female biased (62% females). Females and males did not differ significantly in size based on measurements of head width and hind tibia length, and these two variables were highly correlated. There was a significant effect of female age on egg load. Females aged 1, 4, and 5 d had significantly higher egg loads than freshly emerged females. There was also a significant positive linear relationship between egg load and hind tibia length. Egg load averaged 37.9 ± 1.1 eggs. Eggs, which measured 207.8 ± 12.2 m in length, were elliptical with an anterior nipple-shaped constriction. The longevity of adults was significantly affected by temperature and food (1:1, honey/water). Food had a greater effect in prolonging life as temperature decreased from 35.0 to 10.0°C. The most long-lived adults were fed on honey and kept at 10.0°C (20.2 ± 3.3 d). The rate of parasitism was significantly affected by host age, being significantly higher for 0-h-old eggs than for 12-24-h-old host eggs. There was no significant difference in parasitism between 0-h-and 0-6-h-old eggs and between 06 and 12-24-h-old eggs.
AB - Aspects of the biology of the adult stage of Ufens principalis Owen (Hymenoptera: Trichogrammatidae), an important parasitoid of Homalodisca (Hemiptera: Cicadellidae) eggs in southern California, were studied. The field-based sex ratio of U. principalis was significantly different from 1:1 and was female biased (62% females). Females and males did not differ significantly in size based on measurements of head width and hind tibia length, and these two variables were highly correlated. There was a significant effect of female age on egg load. Females aged 1, 4, and 5 d had significantly higher egg loads than freshly emerged females. There was also a significant positive linear relationship between egg load and hind tibia length. Egg load averaged 37.9 ± 1.1 eggs. Eggs, which measured 207.8 ± 12.2 m in length, were elliptical with an anterior nipple-shaped constriction. The longevity of adults was significantly affected by temperature and food (1:1, honey/water). Food had a greater effect in prolonging life as temperature decreased from 35.0 to 10.0°C. The most long-lived adults were fed on honey and kept at 10.0°C (20.2 ± 3.3 d). The rate of parasitism was significantly affected by host age, being significantly higher for 0-h-old eggs than for 12-24-h-old host eggs. There was no significant difference in parasitism between 0-h-and 0-6-h-old eggs and between 06 and 12-24-h-old eggs.
KW - Biological control
KW - Glassy-winged sharpshooter
KW - Homalodisca liturata
KW - Morphometrics
KW - Sex ratio
UR - http://www.scopus.com/inward/record.url?scp=77749298169&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77749298169&partnerID=8YFLogxK
U2 - 10.1603/AN09052
DO - 10.1603/AN09052
M3 - Article
AN - SCOPUS:77749298169
VL - 103
SP - 236
EP - 246
JO - Annals of the Entomological Society of America
JF - Annals of the Entomological Society of America
SN - 0013-8746
IS - 2
ER -