Effects of physiological condition and experience on oviposition behaviour ofTrichogramma australicumGirault (Hymenoptera: Trichogrammatidae) on eggs ofHelicoverpa armigeraHübner (Lepidoptera: Noctuidae)

1999 ◽  
Vol 38 (2) ◽  
pp. 104-114 ◽  
Author(s):  
Nurindah ◽  
Bronwen W Cribb ◽  
Gordon Gordh
Keyword(s):  
Physiological Condition ◽  
Oviposition Behaviour ◽  
Lepidoptera Noctuidae

scholarly journals No evidence for change in oviposition behaviour of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) after widespread adoption of transgenic insecticidal cotton

2012 ◽  
Vol 102 (4) ◽  
pp. 468-476 ◽  
Author(s):  
M.P. Zalucki ◽  
J.P. Cunningham ◽  
S. Downes ◽  
P. Ward ◽  
C. Lange ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Oviposition Behaviour ◽  
Bt Cotton ◽  
Cotton Crop ◽  
Geographic Locations ◽  
Strong Selection ◽  
Relative Ranking ◽  
Main Target ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae

AbstractCotton growing landscapes in Australia have been dominated by dual-toxin transgenic Bt varieties since 2004. The cotton crop has thus effectively become a sink for the main target pest, Helicoverpa armigera. Theory predicts that there should be strong selection on female moths to avoid laying on such plants. We assessed oviposition, collected from two cotton-growing regions, by female moths when given a choice of tobacco, cotton and cabbage. Earlier work in the 1980s and 1990s on populations from the same geographic locations indicated these hosts were on average ranked as high, mid and low preference plants, respectively, and that host rankings had a heritable component. In the present study, we found no change in the relative ranking of hosts by females, with most eggs being laid on tobacco, then cotton and least on cabbage. As in earlier work, some females laid most eggs on cotton and aspects of oviposition behaviour had a heritable component. Certainly, cotton is not avoided as a host, and the implications of these finding for managing resistance to Bt cotton are discussed.

Oviposition Behaviour of the Woodwasp, Sirex Noctilio F.

1974 ◽  
Vol 22 (3) ◽  
pp. 341 ◽  
Author(s):  
JL Madden
Keyword(s):  
Physiological Condition ◽  
Oviposition Behaviour ◽  
Host Tree ◽  
Sirex Noctilio ◽  
Phloem Sap ◽  
Factors Affecting ◽  
Egg Deposition ◽  
Basic Biology

The basic biology of the female woodwasp and factors affecting oviposition behaviour are described. The rate of egg deposition 1s related to the physiological condition of the host tree; it is demonstrated that the wasp's ability to assess its host tree is directly related to the osmotic quality of the phloem sap.

scholarly journals Pengaruh sinar bulan terhadap telur Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) pada lahan bawang merah

2020 ◽  
Vol 17 (1) ◽  
pp. 45
Author(s):  
Hermanu Triwidodo ◽  
St Nurlaela Fauziah
Keyword(s):  
Distribution Pattern ◽  
High Intensity ◽  
Spodoptera Exigua ◽  
Full Moon ◽  
Oviposition Behaviour ◽  
Central Java ◽  
Morisita Index ◽  
Lepidoptera Noctuidae

<p><em>Spodoptera exigua</em> (Hübner) are nocturnal insects and one of the important pests of shallot. The activities of nocturnal insects are influenced by the moonlight. The aim of this research is to analyze the effect of moonlight on oviposition behaviour: number of egg patches, number of eggs per patches and egg gpatches distribution pattern of <em>S. exigua</em>. The research was done on three shallot field at Brebes Regency, Central Java during the new, half and full moon. The sampling included observing the number of egg groups, the number of eggs per egg group, and egg groups distribution pattern of <em>S. exigua</em> on each observation plot. The egg groups distribution pattern of <em>S. exigua</em> based on Morisita index. The result of this research showed that the number of egg groups and the number of eggs per egg group always increased from the new, half, and full moon. In general, the egg groups distribution pattern of <em>S. exigua</em> were clustered on three moonlight conditions. High intensity of moonlight (full moon) was be able to increase the number of egg groups and the number of eggs per egg groups of <em>S. exigua</em>, its potentially cause more attacks.</p>

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