Formerly International Journal of Basic and Applied Agricultural Research

Occurrence of leaf feeder Podontia quatuordecimpunctata (Linnaeus, 1767) in Spondias pinnata (L.f.) Kurz at Kamrup district of Assam, India

Pantnagar Journal of Research, Volume - 20, Issue - 1 ( January-April. 2022)

Published: 2022-04-30

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Spondias pinnata (family: Anacardiaceae), known as Indian hog-plum, is a species of popular minor fruit tree of Assam with edible sour fruits among the underutilized fruit crops. It is medicinally important and the fruit is a valuable source of vitamin C. The tree is severely damaged by a coleopteran leaf feeder known as Podontia quatuordecimpunctata (family: Chrysomelidae). The pest is widely distributed in Assam, West Bengal, Meghalaya, Sikkim and Uttar Pradesh. The pest was appeared in May, 2019 as a serious defoliator of Spondias pinnata and first record in Southern part of Kamrup district of Assam. Mating took place 3-7 days of emergence and copulation took place in the early hours of morning. Eggs were laid in cluster of 20-50 and arranged in circular manner. Egg clusters were also noticed in non-host plant like Murraya koenigii but did not feed. Incubation period was 5-8 days and hatching took place in day and night. The newly hatched grub fed gregariously for 2-3 days. The grub retained its feces directly on the dorsum. The larval (grub) period was 12-16 days and had four instars. Pupation took place in soil. The adult beetle was 1.8-2.0 cm long. The pest appeared during onset of rainy season (May) with a peak in Jun/Jul and disappeared in Nov/Dec. The leaf defoliation was caused by the grub and adult beetle.

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