Cryptophlebia ombrodelta Lower

Cryptophlebia ombrodelta Lower View in CoL ( Tortricidae )

Based on the external morphological characters of the adults ( Figs. 3a, b View Figure 3 ) from this study and compared with those previously given by Lower (1898), the pest infesting C. fistula truits in Vietnam was confirmed as Cryptophlebia ombrodelta Lower, 1898 ( Tortricidae : Olethreutinae). The characteristic features of this pest, based on morphological examination of 21 specimens, are as follows:

Adults are reddish brown with a dark-brown pre-tornal spot that is more pronounced in females. Males have sex scales on the hindwing, hind tibia, and abdomen. Female with forewing length 20.5– 24.5 mm, body size 8.4–10.1 mm long ( Fig. 3a View Figure 3 ). Male with forewing length 17.5–20.5 mm, body size 8.0– 9.2 mm long ( Fig. 3b View Figure 3 ).

Eggs are scale-like, creamy white, and then gradually turn yellow, nearly round in shape, 1.0– 1.2 mm in diameter.

Late instar larvae are approximately 18.5–22.5 mm long. The abdomen is yellowish, turning reddish in the final instar. The head is dark brown, turning yellowish brown in the final instar ( Fig. 3c View Figure 3 ).

Pupae are light brown at first, then darken, 10.2–12.8 mm long, 2.0– 2.9 mm wide ( Fig. 3d View Figure 3 ), male pupae are smaller than female pupae.

Damage symptoms: C. ombrodelta was associated with damage to dry fruit. Infested C. fistula fruits have circular holes with a diameter of 0.32–0.41 cm. Frass is mixed with larval silk around the holes on the fruits. Droppings are discrete, semi-circular and dark yellow or brown ( Fig. 3d View Figure 3 ). The tunnels go straight into the fruits and then vertically to the centre of the fruit. The tunnels are circular, 0.35–0.45 cm in diameter, 12.1–21.3 cm long. The larvae and pupae live inside the fruits. Before the adult emerges, the pupa will move and stick part of its body out of the hole ( Fig. 3e View Figure 3 ). Severely damaged fruits can have 2– 3 larvae inside. This species was recorded in Son La and Yen Bai provinces.