BN5DSIBV

12583

28 octobre 2020 12:25

29 avril 2025 10:48

Oion condiment(Allium cepa L.) is economically important widely grown binnenial vegetable, consumed in daily culinary dishes as green leafy vegetable and dry bulb form(Shaikh et al., 2014). In the world ranking, Pakistan stand as 6th largest exporter of onion with the share of 3% in international market(Haider et al., 2014). It is cultivated on 130.6 thousand hectares of land in Pakistan with annual production of 1674.6 thousand tons(GOP, 2016). The onions vary in their characters such as shape, coloration and taste. Onion bulbs have a great variation in color(white, yellow, red) and shape(round or flattened). Onion is important due to its medicinal benefits and it is rich in phosphorus, calcium and carbohydrates. In Pakistan onion production is facing a threat of sucking pests. The insect pests which damages onion field crop mainly include thrips, head borer, maggots, cutworm and leaf minors(Khan et al., 2015). Thrips tabaci Lindeman(Thysanoptera: Thripidae) is most destructive and worldwide pest of Allium cepa causing direct and indirect damage to crop. It reduces 50 percent onion yield by sucking cell sap as direct damage while inflict indirect damage through spreading various diseases(Lewis, 1997). Epidermal cells of onion leaves are destroyed as a result of thrips feeding producing silvery blotches on leaves. Thrips act as a vector of various diseases, minute in size, highly fecunditive, phytophagous, multivolatine, polyphagous and cosmopolitan insect pest. It is capable of disseminating Tops virus and IYSV in onion young seedlings(Stuart et al., 2011). Thrips are 2mm long, slenderical shaped vegetable pest. Adults are brown in colour having asymmetrical mouthparts. Thrips tabaci life cycle consists of egg, two larval instars, prepupae and pupal stage and adult(Ghabn, 1948). High temperature favours the development of thrips while at low temperature its development slows down(Mound, 1997). It is a pest of more than 140 host plant.

None

• AB - Utile à l'AB
• FREDO lutte
• GEO Pakistan
• SPECIES ail
• biocontrôle
• insecticides
• ravageur

Pakistan Journal of Zoology

10/2020

1 octobre 2020