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Biological Control of Insect Pests: Southeast Asian Prospects - EcoPort

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4.1 Agrius convolvuli 15<br />

Telenomus sp., up to a total <strong>of</strong> 43.6%. T. australicum, followed by<br />

Telenomus sp., were the main species emerging from eggs on<br />

Clerodendrum, up to a total <strong>of</strong> 63.9%. At no time were T. achaeae or<br />

T. agriae reared from eggs on Clerodendrum. Furthermore, T. australicum<br />

was reared only twice from Agrius eggs on Colocasia. These results<br />

highlight the difficulty <strong>of</strong> reaching decisions on host specificity on the basis<br />

<strong>of</strong> laboratory trials in a non-natural environment.<br />

Up to 49 Trichogramma individuals were reared from a single<br />

A. convolvuli egg and only in two instances were more than 1 species reared<br />

from a single egg. These were 7 T. agriae and 4 T. australicum on one<br />

occasion and 7 T. achaeae and 11 T. australicum in the second. Eggs<br />

parasitised by Telenomus sp. usually produced 3 to 5 adults and at no time<br />

did a Trichogramma emerge from the same egg as a Telenomus (Nagarkatti<br />

1973). Later, an additional parasitoid (Trichogramma confusum) was<br />

recorded from the eggs <strong>of</strong> A. convolvuli on Clerodendrum chinense<br />

(Nagarkatti and Nagaraja 1978).<br />

Nagarkatti (1973) suggested that the 4 former species might be<br />

introduced where A. convolvuli is a pest and where they do not already<br />

occur.<br />

INDONESIA<br />

Leefmans (1929) reported the parasitisation <strong>of</strong> A. convolvuli eggs by<br />

Trichogramma minutum imported from America. However, Nagarkatti<br />

(1973) suggests that, from the distribution <strong>of</strong> T. minutum at that time, it must<br />

have been T. australicum or some other species <strong>of</strong> Trichogramma.<br />

IRELAND<br />

An adult A. convolvuli produced, soon after capture, many small puparia,<br />

from which 76 Megaselia rufipes (Diptera, Phoridae) emerged (Flemying<br />

1918).<br />

JAPAN<br />

A species <strong>of</strong> Trichogramma that parasitises the eggs <strong>of</strong> Chilo<br />

suppressalis (= C. simplex) was imported in 1929 from the Philippines. It<br />

was shown to parasitise also the eggs <strong>of</strong> A. convolvuli and 10 other species <strong>of</strong><br />

Lepidoptera belonging to several families (Shibuya and Yamashita 1936).<br />

Nagarkatti (1973) suggests that the species was Trichogramma australicum.<br />

OMAN<br />

Adults <strong>of</strong> the tachinid Zygobothria ciliata emerged from puparia from a<br />

larva collected on Ipomoea (Whitcombe and Erzinclioglu 1989).

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