8-2-10-INCIDENCE OF RED PUMPKIN BEETLE AND FRUIT FLY ON DIFFERENT VARIETIES OF SWEET GOURD

S. Ahmed, N. Akhter* and M. A. Latif

*Corresponding author E-Mail: nurmohalsau@yahoo.com

Abstract

The study was conducted in the central farm of Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka during the period from April to July, 2015 to find out the incidence of red pumpkin beetle and fruit fly on different varieties of sweet gourd. Seven varieties of sweet gourd e.g., Sweet Queen, Pronoy F1 (hybrid), Thai Sweet, Big Boss, Monika, Shokti, and Syndrila were used as treatments. The study was laid out in Randomized Complete Block Design (RCBD) with four replications. Data on infestation levels at different growth stages were recorded to find out the tolerant variety of sweet gourd for better production. The highest infestation of red pumpkin beetle (RPB) was found in Thai sweet (32.00 %) variety followed by Pronoy F1 (20.00 %) variety. On the other hand the lowest infestation was found in Big Boss (5.00 %) and Shokti (5.00 %) varieties. Big Boss and Shokti varieties were found more tolerant to the RPB than the other varieties. Highest infestation (23.00 %) was found in Thai sweet and Pronoy F1 caused by cucurbit fruit fly and the lowest infestation was found in Shokti (2.00 %) variety. Shokti variety was more tolerant to the red pumpkin beetle and cucurbit fruit fly than the other varieties and it encouraged growth giving higher yield (25.23 t/ha).

Key words: Sweet gourd, pumpkin beetle and fruit fly.

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J. Expt. Biosci.8(2) July 2017

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6-1-13-Fatema Begum et al

BIOCHEMICAL CHANGES IN THE VIRUS INFECTED PUMPKIN PLANTS

Fatema Begum*, A. M. Akanda, M. A. T. Masud

*Corresponding author; Email: fatema22_sau@yahoo.com

Abstract

Twenty six pumpkin lines were evaluated against different viruses. Four viruses were identified by DAS-ELISA namely Cucumber mosaic virus (CMV), Papaya ringspot virus (PRSV), Watermelon mosaic virus 2 (WMV2) and Zucchini Yellow mosaic virus (ZYMV) and symptoms were present in field but antisera were not used, identified as other potyvirus. After detection the present experiment were conducted to determine the biochemical changes in Cucurbita moschata due to infection of different viruses. The cellular components were varying extent in infected pumpkin leaves compared to healthy ones. Chlorophyll a, Chlorophyll b and β-carotene were decreased in virus infected leaves compared to healthy ones. The ratio of Chlorophyll a and b was decreased due to virus infection in all cases. The highest reduction of Chlorophyll a, Chlorophyll b and β-carotene was observed in CMV infected leaf. The lowest reduction of Chlorophyll a, Chlorophyll b and β-carotene was observed due to PRSV-W infection and no change was observed in healthy leaves. There was positive and significant relationship between SPAD value and yield of pumpkin plants.

Keywords: Biochemical changes, Five viruses (PRSV-W, CMV, ZYMV, WMV2 and other potyvirus), Pumpkin.

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Return Volume: Journal of Experimental Biosciences 6(1): January 2015

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