Anagelasta apicalis, Pic, 1925

Pham, Duy Long, Chi, Nguyen Minh, Loi, Vu Van, Danh, Duong Ngoc, Vui, Nguyen Thi Kim, Hung, Pham Tien, Dinh, Le Cong, Ha, Ngoc Linh & Vitali, Francesco, 2023, Longhorn beetles as new pests for exotic plantations in Vietnam, Ecologica Montenegrina 70, pp. 188-198 : 192

Anagelasta apicalis damage in Eucalyptus hybrid

First and second-instar larvae initially feed on the inner layers of the bark, including the phloem and the stratum corneum. After feeding on the bark, larvae primarily bore into the layer of wood located beneath the bark. Larvae tunnel through the sapwood, creating a zigzag pattern or serpentine galleries, 9.5–13.5 mm wide and 26–35 cm long. Larvae complete their development and adults emerge through exit holes which are 11.5–12.5 mm in diameter. A. apicalis often causes damage at the base of host trees, 5–20 cm above the ground ( Fig. 2D ), preferentially attacking trees under stress or disease. The density of larvae is sometimes very high, A. apicalis causing significant damage by feeding all the wood layers at the base of tree and consequently, causing host trees to die.

Figures

Figure 2. Anagelasta apicalis damage in Eucalyptus hybrid (E. urophylla × E. grandis) in Bac Giang province: A, B, C. female adult; D. damaged tree with holes near the base.