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.

Within- and Between-Population Variation in Host-Plant Preference and Specificity in Australian Helicoverpa Armigera (Hubner) (Lepidoptera: Noctuidae).

1996 ◽  
Vol 44 (5) ◽  
pp. 503 ◽  
Author(s):  
MFA Jallow ◽  
MP Zalucki
Keyword(s):  
Host Plant ◽  
Helicoverpa Armigera ◽  
Rank Order ◽  
General Pattern ◽  
Population Variation ◽  
Host Plant Preference ◽  
Significant Difference ◽  
Helicoverpa Armígera ◽  
Host Plant Specificity ◽  
Lepidoptera Noctuidae

Using a tethered-insect technique, we investigated within- and between-population variation in the post-alighting host-plant preference and specificity of female Helicoverpa armigera from four populations. No significant difference occurred among populations in host-plant preference. Differences in host-plant preference existed among female moths within a population, and these differences are under genetic control and heritable. Most females ranked maize, sorghum and tobacco highest, followed by cotton varieties DP90 and HG660. The least-preferred plants were cowpea and lucerne. A few females (20%) differed from this general pattern and among each other, and reversed the rank order of host plants. Within a population, individual female moths differed in their host-plant specificity, with some individuals being more generalist than others. Similarly, significant differences occurred in host-plant specificity among populations. The relevance of these findings are discussed in relation to polyphagy in H. armigera.

Host Plant-Selection by Helicoverpa-Armigera (Lepidoptera, Noctuidae) - the Role of Some Herbivore Attributes

1991 ◽  
Vol 39 (3) ◽  
pp. 343 ◽  
Author(s):  
S Firempong ◽  
MP Zalucki
Keyword(s):  
Helicoverpa Armigera ◽  
Laboratory Experiments ◽  
Host Preference ◽  
Rank Order ◽  
Host Plant Selection ◽  
Plant Selection ◽  
Larval Frass ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae

The effect of various 'herbivore' attributes on oviposition in Helicoverpa armigera were considered in a series of laboratory experiments. Larval diet did not influence the rank order of adult host preference, but early adult experience around a host increased oviposition on that host in subsequent trials. The presence of eggs laid 12 h before did not influence subsequent oviposition on a plant, although newly laid eggs may have. The presence of larvae, larval damage to plants and larval frass reduced oviposition on a plant. These results are discussed in relation to polyphagy in H. armigera.

scholarly journals Host Plant Selection Affects Biological Parameters in Armyworm, Spodoptera litura (Lepidoptera: Noctuidae)

2019 ◽  
Vol 51 (6) ◽  
Author(s):  
Asad Abdullah ◽  
Muhammad Irfan Ullah ◽  
Abu Bakar Muhammad Raza ◽  
Muhammad Arshad ◽  
Muhammad Afzal
Keyword(s):  
Host Plant ◽  
Spodoptera Litura ◽  
Host Plant Selection ◽  
Biological Parameters ◽  
Plant Selection ◽  
Lepidoptera Noctuidae

Interaction between Helicoverpa armigera and Colletotrichum gloeosporioides on the tropical pasture legume Stylosanthes scabra

2000 ◽  
Vol 51 (1) ◽  
pp. 107 ◽  
Author(s):  
Peter A. Wilson ◽  
Peter M. Room ◽  
Myron P. Zalucki ◽  
Sukumar Chakraborty
Keyword(s):  
Host Plant ◽  
Adult Female ◽  
Helicoverpa Armigera ◽  
Colletotrichum Gloeosporioides ◽  
Life Stages ◽  
Tropical Pasture ◽  
Helicoverpa Armígera ◽  
Stylosanthes Scabra ◽  
Lepidoptera Noctuidae ◽  
Pasture Legume

Glasshouse experiments determined effects of a moth, Helicoverpa armigera (Lepidoptera: Noctuidae), and the anthracnose pathogen, Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., on each other when attacking the same host plant, Stylosanthes scabra (Vog.) (Leguminosae) cv. Fitzroy. The host was treated with both organisms in 2 ways of succession and at 2 different life stages each. Larvae of the moth preferred to feed on healthy plants rather than plants recently infected with C. gloeosporioides, and preferred such newly infected plants to severely diseased ones. Adult female moths laid more eggs on healthy and recently infected plants than on diseased plants, when given a choice of all 3 plant types. Severity of anthracnose disease was neither promoted nor retarded by damage to leaves caused by larvae of the moth.

Host Plant-Selection by Helicoverpa-Armigera (Hubner) (Lepidoptera, Noctuidae) - Role of Certain Plant Attributes

1989 ◽  
Vol 37 (6) ◽  
pp. 675 ◽  
Author(s):  
S Firempong ◽  
MP Zalucki
Keyword(s):  
Host Range ◽  
Host Plant ◽  
Plant Height ◽  
Plant Extracts ◽  
Water Status ◽  
Host Plant Selection ◽  
Plant Water ◽  
Plant Selection ◽  
Lepidoptera Noctuidae

The role of some plant properties in host plant selection by adults of the polyphagous H. armigera were investigated. Those factors found to positively influence host plant selection included presence of flowers, plant height and application of soil fertiliser. The presence of flowers greatly increased a plant's attractiveness to oviposition. Non-hosts, on which larvae did not survive, were readily oviposited on when offered in flower along with known hosts not in flower. The attractiveness of flowers may provide a mechanism for the expansion of host range. However, no effect of crude plant extracts (including various flowers) on oviposition could be detected. The role of chemical attractants is discussed. Tall plants attracted heavy oviposition and it is suggested that moths use silhouette as a cue to locating plants. There was no effect of plant water status on oviposition.

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