Abstract
The abundance of insect pests, predators and pollinators and status of pest insects associated with citrus, mango and pineapple crops grown in an agroforestry in Bangladesh was studied during July 2015 to June 2016. Twenty five species of insects belonging to 19 families in 5 orders were found as pest of citrus and their relative abundance varied from 2.4 to 13.4%. Among the citrus pests, green leaf hopper was most abundant, but whitefly, mealy bug, lemon butterfly and leaf minor were found as major pests. Fifteen species of insects under 13 families in 6 orders were found as pests of mango and their relative abundance varied from 0.5 to 82.6%, and hopper and fruit fly were found as major pests. Four species of insects belonging to 4 families in 3 orders were found as pest of pineapple and their relative abundance varied from 12.2 to 44.9%, and all were found as minor pests. There were 20 species of predator insects belonging to 13 families in 6 orders and their abundance ranged from 0.8 to 2.5/ 40 sweeps. In total 19 species of insects belonging to 12 families in 4 orders were found as pollinators and their abundance varied from 1.7 to 5.1/40 sweeps. The ants and honeybees were most abundant as predators and pollinators, respectively.
 SAARC J. Agri., 17(1): 13-22 (2019)
Highlights
Bangladesh is a subtropical country having an area of 147570 km2 with 160.2 million people
In the present study, the abundance of insect pests, predators and pollinators, status of insect pests associated with citrus, mango and pineapple were taken into investigation
Leaf, flower and fruit of citrus, mango and pineapple were observed for infestation (%) of different insect pests
Summary
Bangladesh is a subtropical country having an area of 147570 km with 160.2 million people. Agroforsetry is an agricultural system comprising diversity of plants, pests, predators and pollinators which are linked to crop productivity. Intensive agricultural system creates disturbance of the natural habitats, and affects species richness, abundance and community structure (Debinski and Holt, 2000). The diversity of crop species in the agroforestry provides a variety of resources like shelter and food for predators and pollinators. Pineapple and citrus are popular fruits in Bangladesh and these crops are widely grown throughout the country. Pineapple, citrus and mango are cultivated as lower, middle and upper storied crop, respectively, but there is limited information regarding insect abundance and their nature of interactions with these crops. In the present study, the abundance of insect pests, predators and pollinators, status of insect pests associated with citrus, mango and pineapple were taken into investigation
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