Abstract
We investigated ovipositional preference of Helicoverpa armigera (Lepidoptera: Noctuidae) for a range of host plants, larval performance on a range of host plants, dispersion rate of a concentrated population of fifth instar larvae, the fitness consequences of cannibalism at two levels of food availability, and the frequencies of cannibalism between larvae of different instars. Eggs laid by adult females were concentrated on some specific plants, despite the wide range of host plants of H. armigera. However, the larvae dispersed when they reached high larval density and eventually exhibited a uniform spatial distribution. Cannibalism frequently occurred under poorer nutritional conditions or greater larval rearing density. The effect of cannibalism on development and pupal weight differed between rich and poor nutritional rearing conditions. The cannibals' fitness was decreased under suitable food conditions, whereas larvae with a low frequency of cannibalism increased their pupal weight, a potential fitness trait, in unsuitable conditions. These results suggest that cannibalism is a behavior of larval H. armigera that has evolved to remove potential intraspecific competitors and thus to avoid unsuitable conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 793-798 |
| Number of pages | 6 |
| Journal | Annals of the Entomological Society of America |
| Volume | 96 |
| Issue number | 6 |
| Publication status | Published - Nov 2003 |
Fingerprint
Keywords
- Cotton bollworm
- Food availability
- Intraspecific predation
- Larval development
- Spatial pattern
ASJC Scopus subject areas
- Insect Science
Cite this
Egg laying preference, larval dispersion, and cannibalism in Helicoverpa armigera (Lepidoptera : Noctuidae). / Kakimoto, Tsuyoshi; Fujisaki, Kenji; Miyatake, Takahisa.
In: Annals of the Entomological Society of America, Vol. 96, No. 6, 11.2003, p. 793-798.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Egg laying preference, larval dispersion, and cannibalism in Helicoverpa armigera (Lepidoptera
T2 - Noctuidae)
AU - Kakimoto, Tsuyoshi
AU - Fujisaki, Kenji
AU - Miyatake, Takahisa
PY - 2003/11
Y1 - 2003/11
N2 - We investigated ovipositional preference of Helicoverpa armigera (Lepidoptera: Noctuidae) for a range of host plants, larval performance on a range of host plants, dispersion rate of a concentrated population of fifth instar larvae, the fitness consequences of cannibalism at two levels of food availability, and the frequencies of cannibalism between larvae of different instars. Eggs laid by adult females were concentrated on some specific plants, despite the wide range of host plants of H. armigera. However, the larvae dispersed when they reached high larval density and eventually exhibited a uniform spatial distribution. Cannibalism frequently occurred under poorer nutritional conditions or greater larval rearing density. The effect of cannibalism on development and pupal weight differed between rich and poor nutritional rearing conditions. The cannibals' fitness was decreased under suitable food conditions, whereas larvae with a low frequency of cannibalism increased their pupal weight, a potential fitness trait, in unsuitable conditions. These results suggest that cannibalism is a behavior of larval H. armigera that has evolved to remove potential intraspecific competitors and thus to avoid unsuitable conditions.
AB - We investigated ovipositional preference of Helicoverpa armigera (Lepidoptera: Noctuidae) for a range of host plants, larval performance on a range of host plants, dispersion rate of a concentrated population of fifth instar larvae, the fitness consequences of cannibalism at two levels of food availability, and the frequencies of cannibalism between larvae of different instars. Eggs laid by adult females were concentrated on some specific plants, despite the wide range of host plants of H. armigera. However, the larvae dispersed when they reached high larval density and eventually exhibited a uniform spatial distribution. Cannibalism frequently occurred under poorer nutritional conditions or greater larval rearing density. The effect of cannibalism on development and pupal weight differed between rich and poor nutritional rearing conditions. The cannibals' fitness was decreased under suitable food conditions, whereas larvae with a low frequency of cannibalism increased their pupal weight, a potential fitness trait, in unsuitable conditions. These results suggest that cannibalism is a behavior of larval H. armigera that has evolved to remove potential intraspecific competitors and thus to avoid unsuitable conditions.
KW - Cotton bollworm
KW - Food availability
KW - Intraspecific predation
KW - Larval development
KW - Spatial pattern
UR - http://www.scopus.com/inward/record.url?scp=1542318095&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1542318095&partnerID=8YFLogxK
M3 - Article
VL - 96
SP - 793
EP - 798
JO - Annals of the Entomological Society of America
JF - Annals of the Entomological Society of America
SN - 0013-8746
IS - 6
ER -