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.

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.

Role of induced glutathione-S-transferase from Helicoverpa armigera (Lepidoptera: Noctuidae) HaGST-8 in detoxification of pesticides

2018 ◽  
Vol 147 ◽  
pp. 612-621 ◽  
Author(s):  
Chaitali P. Labade ◽  
Abhilash R. Jadhav ◽  
Mehul Ahire ◽  
Smita S. Zinjarde ◽  
Vaijayanti A. Tamhane
Keyword(s):  
Helicoverpa Armigera ◽  
Glutathione S Transferase ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae

Host Plant Preferences of Populations of Helicoverpa-Armigera (Hubner) (Lepidoptera, Noctuidae) From Different Geographic Locations

1989 ◽  
Vol 37 (6) ◽  
pp. 665 ◽  
Author(s):  
S Firempong ◽  
MP Zalucki
Keyword(s):  
Helicoverpa Armigera ◽  
Host Plants ◽  
Rank Order ◽  
Geographic Locations ◽  
Helicoverpa Armígera ◽  
Major Pest ◽  
Lepidoptera Noctuidae ◽  
Different Sources ◽  
Test Plants ◽  
Basic Rank

Helicoverpa armigera in Australia is found in many different geographic locations and has been recorded on a large number of host plants. We partly investigated the nature of this polyphagy by offering moths from six different sources the same set of host plants in oviposition trials. Laboratory H. armigera ranked the plants offered into the following categories: most preferred-tobacco, maize, sunflower; least preferred-cabbage, pigweed and linseed; intermediate-soybean, cotton and lucerne. Moths reared from field collected larvae showed a similar basic rank order, although there were a number of differences between populations. Further work will be needed to clarify if these small differences represent real geographic variation or simply reflect differences between batches of test plants. Tobacco and sunflower were consistently ranked highly by virtually all populations and, cotton, on which H. armigera is a major pest, was ranked very low. The possibility of exploiting the non- attractiveness of cotton in pest management is discussed.

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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