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Study on Biology of Red Pumpkin Beetle in Sweet Gourd Plants

Md. Arshad Ali
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md. Shahidul Islam
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md. Nazirul Islam Sarker
Department of Agricultural Extension Education, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md. Azizul Bari
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to study the biology of red pumpkin beetle, Aulacophora foveicollis (Lucas.) under laboratory condition. Sweet gourd plants were used as host plant for studying biology the test insect. It was found that female red pumpkin beetle laid a range of 128 to 194 eggs with an average of 152.3 ± 20.9. Oviposition period varied from 9 to 13 days with an average of 10.7 ± 1.2 days. The average length and breadth of egg at 1st, 2nd, 3rd and final instar larva and also pupa were 0.75 ± 0.08 mm and 0.60 ± 0.03 mm, 2.00 ± 0.12 mm and 0.41 ± 0.06 mm, 4.67 ± 0.44 mm and 0.65 ± 0.08 mm, 7.77 ± 0.18 mm and 0.83 ± 0.09 mm, 11.67 ± 0.88 mm and 2.07 ± 0.18 mm, 5.37 ± 0.29 mm and 113 ± 0.18 mm, respectively. Incubation period, larval period and pupal period were 11.53 ± 0.1 days, 16.674.33 days and 12.38 ± 0.31 days, respectively. The average longevity of adult male and female was 40.67 ± 0.66 days and 47.33 ± 3.06 days, respectively.

Keywords: Oviposition, Developmental stage, Longevity, Aulacophora foveicollis (Lucas.)

Location: In the laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date: 00-01-2007

End Date: 00-04-2007

Program Area: Pest Management

Commodity: Sweet gourd, Beetle

Objectives:

The present study was undertaken to investigate the biology of red pumpkin beetle on sweet gourd plants under laboratory condition

Methodology:

The experiments were conducted on the biology of red pumpkin beetle, Aulacophora fovecollis (Lucas.) in the laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh during the period from January to April, 2007. The prevailing room temperature was 30 ± 2 °C with relative humidity 80 ± 5%.

Food Sources Sweet gourd (Cucurbita moschata) leaves were used as food for red pumpkin beetle. All the leaves were collected from Char Nilokhia, Mymensingh Sadar Thana, Mymensingh, Bangladesh. Das and lshaque (1998b) recorded the food plants of A. faveicollis and the food plants were bottle gourd (L. siceraria), cucumber (C. sativus), watermelon (Citrullus lanatus), ridge gourd (L. acutangula), pointed gourd (T.dioica) and ash gourd (B. hispida).

Mass Culture of the Test Insect In order to meet the demand of test insect, a stock culture of large number of grubs and adult beetles were maintained in the laboratory. For this purpose, the adults of A. foveicollis (Lucas.) were collected from the host plants of the farmer's field of Char Nilokhia. Breeding and rearing of the field collected insects were done in 9 cm × 1.5 cm diameter Petri-dishes in the laboratory. Adult beetles were sexed and confined in pairs in the petri-dishes for mating and oviposition. Fresh and healthy leaves of host plants were supplied every day for each pair of insect. The cut end of the leaf petiole was provided with water soaked cotton pad to prevent leaf from withering. After oviposition, adults beetle were transferred in different petri-dishes and the eggs were kept undisturbed for hatching. Immediately after hatching, the larvae were transferred in different petri-dishes; ten larvae per petri-dish were reared up to adult emergence .The newly emerged adults were again sexed and confined in pairs in petri-dishes for mating and laying eggs. This culture was maintained in order to avoid the effect of previous food plants on the biology of the test insect.

Biology From laboratory stock, immediately after hatching larvae of red pumpkin beetle were carefully transferred to previously marked petri-dishes (dia 9.0 cm) with the help of a soft camel hair brush. Moistened soils were placed to cover the bottom of each petri-dish, Soils are moistened at every 24 hours interval. One grub was reared in each petri-dish. Fresh leaves of sweet gourd plants were given to the larvae at 24 hours interval in morning and uneaten leaves along with feces were removed. The cut end of the leaf petiole was provided with water soaked cotton pad to prevent leaf from withering. The larvae were observed daily until pupation to record the number of larval instars and their duration. Three replicates were used for the host plant. The petri-dishes were placed randomly on the table in the laboratory. Special care was taken to prevent even slight injury to the skin of the larvae and good hygienic condition was maintained in the rearing dishes. The pupae were kept in the respective Petri-dishes without causing any disturbance until the adult emergence to record pupal period. The length and breadth of larvae at each instars and pupae were measured and recorded.

Source of Information: International Journal of Applied Research 2(1) 1-4, 2015

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Funding Source:

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Achievement/Findings:

Knowledge of the biology and ecology of insect and mite pests and their natural enemies is a prerequisite for pest management methods compatible with Integrated Pest Management. A successful management plan requires information about a species biology including its diet and lifecycle. So the present study was conducted to study the biology of red pumpikin beetle. A female laid eggs with an average of 152.33 ± 20.93 and incubation period was 11.53 ± 0.1 days. The larvae moulted three times and had four instar. The grubs were cruciform. The pupae were greenish in color. Fully developed beetle was red orange in color with metallic tint. Both the adults and larvae cause damage to the host plants.

Knowledge Management: Journal