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Effect of Different Management Tactics on the Incidence and Movement of Red Pumpkin Beetle, Aulacophora Foveicollis on the Leaves of Sweet Gourd, Cucurbita Moschata

Dr. Md. Mohasin Hussain Khan
Professor
Department of Entomology, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh

Abstract/ Executive Summary:

No significant difference was observed on the number of red pumpkin beetle on young leaf among the plots treated with different management tactics. Mature leaf support more number of RPB compared to that of young leaf and the population of RPB gradually increased from 1^st to 3^rd week. The mean number of RPB per plant was higher on upper leaf surface as compared to lower leaf surface in all the treated plots during early hours of the day before 10 am. The highest number of RPB was observed at 7:00 am on the upper surface and at 1:00 pm on the lower surface of leaves. The percent reduction of RPB over control on both surfaces of leaf was maximum (100 %) by the use of mosquito net barrier (T₃) treated plot at 7:00 and 10:00 am, respectively compared to control. The percent reduction of RPB over control at 1:00 pm ranged 94% to 98% on upper leaf surface and at 4:00 pm ranged 94% to 96% on lower surface in T₃ treated plot. The minimum acceptable level of percent reduction (above 87%) of RPB population over control was achieved by application of forwatap 4G @ 4g/plant, Nitro 505 EC @ 1 ml/L, hand picking of adult RPB and planting of musk melon as trap crop. The movement of the adult RPB as expressed through the distribution of the beetles on the upper and lower leaf surfaces of sweet gourd during different hours of a day could be helpful for devising the mechanical and chemical control strategies.

Keywords: Management tactics, incidence, movement, red pumpkib beetle, sweet gourd leaves

Location: Experimental Field of BSMRAU

Start Date: 01-03-2008

End Date: 30-06-2008

Program Area: Pest Management

Commodity: Insects, Insects

Objectives:

To evaluate the effectiveness of some non-chemical and chemical approaches on the incidence and movement of red pumpkin beetle on the upper and lower leaf surface of sweet gourd plants

Methodology:

Field experiment was conducted at experimental farm of BSMRAU, Gazipur during March to June, 2008 to evaluate the effectiveness of different management tactics on the incidence and behavioural biology of red pumpkin beetle. A year round local variety of sweet gourd was included in the study. Nine management tactics were tested with an untreated control. Management tactics were: T₁ = planting of musk melon as trap crop, T₂ = hand picking of adult RPB, T₃ = use of mosquito net barrier for 4 weeks, T₄ = Forwatap 4 G @ 4 g/ plant , T₅ = Forwatap 4 G @ 3 g /plant, T₆ = Emithion 50 EC @ 2 ml / l of water, T₇ = Morter 48 EC @ 1 ml / l of water, T₈ = Vitabryl 85 WP @ 34.4 g / l of water, T₉ = Nitro 505 EC @ 1 ml / l of water and T₁₀ = untreated control (only water spray). The experiment was laid out in randomized complete block design (RCBD) with three replications.

Collection of Data

To evaluate the effect of non-chemical approaches and chemical insecticides for suppressing red pumpkin beetle, data on the number of beetle per leaf per day on 1^st, 2^nd and 3^rd weeks was recorded. The behavioural biology of the adult RPB particularly their movement on upper and lower leaf surfaces during different hours of the day as affected by management tactics was studied. The mean number of beetles recorded during 6 observational days from 14 to 49 days after transplanting (DAT) and percent reduction over control on the upper and lower surfaces of leaves per plant at 7:00 AM, 10:00 AM, 1:00 PM and 4:00 PM of the day in all treated plots were calculated.

Data Analysis

All the data of this study were analyzed by using MSTAT-C software. The percentage data were transformed through Square root transformation as and when needed. Means were separated by Duncan’s Multiple Range Test (DMRT).

Source of Information: Jahanginagar University Journal of Biological Science 2014, 3(2): 73-80.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The findings of the present study may be concluded that the mechanical collection and destruction of the beetles from crop fields should, therefore, be done during study period. During the middle of the day when the outdoor temperature becomes hot due to intense sunlight, the adult RPB are found more on the lower surfaces of leaves than on the upper surfaces. As the adults are found on both surfaces of a leaf, both sides of the leaves of a food plant must be sprayed with a suitable contact insecticide with good residual action and low mammalian toxicity for the effective control of the adult beetles.

Knowledge Management: Journal