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Host Preference of Red Pumpkin Beetle in a Choice Test Under Net Case Condition

M. M. H. Khan
Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University,Gazipur, Bangladesh.

M. Z. Alam
Department of Entomology, Patuakhali Science and Technology University,Gumki, Patuakhali, Bangladesh

M. M. Rahman
Department of Entomology, Patuakhali Science and Technology University,Gumki, Patuakhali, Bangladesh

Abstract/ Executive Summary:

Objective of the study was to observe host preference of RPB on different cucurbits and to determine leaf area damage caused by RPB on cucurbits. The experiment was conducted in a choice test under confined condition in a net cage (a circular disc of 3.8 m diameter made of hardboard). It looked like a large cylindrical dish of 3.8 m diameter and 70 cm height. Five bamboo sticks (45 cm) were tightly fixed with the edge of the dish to hold the mosquito net at the top and surrounding the dish. The entire dish was covered with a nylon mosquito net and was tightly bound around the dish with the help of a nylon rope. The experiments were conducted at 21.5-23.5 ⁰C. Ten cucurbitaceous crops (viz. sweet gourd, bottle gourd, ash gourd, bitter gourd, sponge gourd, ribbed gourd, snake gourd, cucumber, khira and muskmelon) were grown in polyethylene bags containing a mixture of soil, manure and fertilizers. In the present study sweet gourd and musk melon were found to be the most preferred host of red pumpkin beetle and bitter gourd was found as nonpreferred host of RPB. The highest percentage of leaf area damage per plant was observed on musk melon leaves followed by sweet gourd and ash gourd. The lowest percentage of leaf area damage per plant was on snake gourd leaves followed by sponge gourd and bottle gourd.

Keywords: RPB, Cucurbits, Leaf area damage.

Location:

Start Date:

End Date:

Program Area: Pest Management

Commodity: Insects

Objectives:

In present study an attempt was made to observe host preference of RPB on different cucurbits and to determine leaf area damage caused by RPB on cucurbits.

Methodology:

The experiment was conducted in a choice test under confined condition in a net cage (a circular disc of 3.8 m diameter made of hardboard). It looked like a large cylindrical dish of 3.8 m diameter and 70 cm height. Five bamboo sticks (45 cm) were tightly fixed with the edge of the dish to hold the mosquito net at the top and surrounding the dish. The entire dish was covered with a nylon mosquito net and was tightly bound around the dish with the help of a nylon rope. The experiments were conducted at 21.5-23.5 0C. Ten cucurbitaceous crops (viz. sweet gourd, bottle gourd, ash gourd, bitter gourd, sponge gourd, ribbed gourd, snake gourd, cucumber, khira and muskmelon) were grown in polyethylene bags containing a mixture of soil, manure and fertilizers. Fifteen day old seedlings of each cucurbit were placed in the net cage maintaining15 cm distances. Sixty adults of RPB (30 males and 30 females) were placed at the centre of a plastic pot. The pot containing the beetles was placed in the net cage and the beetles were released by removing the lid of the pot and were allowed them to feed on the cucurbit seedling according to their choice. The experiment was conducted with three replications (cages) during the period from 26 February to 6 March 2008. Data were recorded at 1, 6, 12, 24 and 48 hours after release (HAR). The movement of beetles towards each cucurbit plants and feeding activities were recorded. The beetles fed on the leaves of respective cucurbit plants. The leaf area damaged by RPB in each cucurbit was estimated after 48 HAR. Analyses were made accordingly.

Source of Information: Bangladesh J. Zool. 39(2): 231-234, 2011

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the present study sweet gourd and musk melon were found to be the most preferred host of red pumpkin beetle and bitter gourd was found as nonpreferred host of RPB. The highest percentage of leaf area damage per plant was observed on musk melon leaves followed by sweet gourd and ash gourd. The lowest percentage of leaf area damage per plant was on snake gourd leaves followed by sponge gourd and bottle gourd.

Knowledge Management: Journal