24. Host plant range of Aphidophagous hoverflies in relation to their prey aphids in Badin, Sindh, Pakistan

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Kamal Khan Abro, Nasreen Memon, Attaullah Ansari, Muhammad Ismail Memon

Abstract

Aphidophagous hoverflies are one of the significant groups of family syrphidae for their larvae as well as adults, larvae feed on many insect pests i.e. aphids, jassids, thrips, which mainly infest several crops such as brassica, spinach, rice, wheat etc., whereas their adults are very important pollinators for these crops. This study was carried out to identify the hoverfly species which can be used as pest control of various agricultural crops grown in Badin which is a monsoon climatic region and main agricultural area of Sindh coastal line where a variety of flowering crops, fruits and vegetables are cultivated; and these include mango, banana, guava, lemon, jojoba, sugarcane, reddish, brassica, wheat, rice, okra, cabbage, chilli, cucumber, sunflower, tomato, onion etc. This study was conducted in the various farming fields of district Badin during the cropping season from January-April 2017. As a result a total of 253 specimens of 2 species, Sphaerophoria scripta and Episyrphus balteatus belonging to genus Sphaerophoria and Episyrphus were trapped by the help of insect hand net and malaise trap. Out of these 253 specimens, 34 were male and 219 were female. Pearson correlation analysis showed that there was strong positive and significant correlation of hoverflies population with the number of host plants as well as number of aphid colonies per month the values being r =.820 (p= 0.012) and r = .875 (p= 0.01) respectively.


Keywords: Aphidophagous hoverflies; Aphids; Badin; Host plants; Pakistan; Prey; Sindh


http://dx.doi.org/10.19045/bspab.2019.80065

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