Abstract
The sweet potato weevil (Cylas formicarius, 1798) is one of the most damaging sweet potato pests. To prevent an economic crop loss, it is very important to develop a suitable and efficient integrated pest management strategy. A field experiment was set up with three replications at Jamalpur to select the best integrated management package from eight different treatments against sweet potato weevil. The results showed that the lowest percentage of infestation by number (2.94 %) and mass (3.22 %) was found when the crop was planted on November 01; earthing-up for two times, Carbofuran 5G was sprayed @ 15 kg ha-1 at 60 days after planting with irrigation and tuber was harvested at 130 days after planting. The marketable yield (23.75 kg) and percent increase of yield than control (50.86 %) performed the highest in the same combination. These findings suggested an effective integration of different management strategies to reduce sweet potato weevil infestation in Bangladesh successfully.
Highlights
The sweet potato (Ipomoea batatas (L.) Lam.) has an important role in transforming the nutrition and food security for developing countries significantly in recent years (Korada et al, 2010)
The sweet potato weevil (SPW) (Cylas formicarius [Fabricius, 1798]) has become widely dispersed, mainly in tropical and subtropical areas of the world (Hue and Low, 2015), and it recently has been found in higher latitude areas as well
The different integrated treatments were tested for evaluating the efficacy in controlling sweet potato weevil
Summary
The sweet potato (Ipomoea batatas (L.) Lam.) has an important role in transforming the nutrition and food security for developing countries significantly in recent years (Korada et al, 2010). The sweet potato weevil (SPW) (Cylas formicarius [Fabricius, 1798]) has become widely dispersed, mainly in tropical and subtropical areas of the world (Hue and Low, 2015), and it recently has been found in higher latitude areas as well. The sweet potato larvae make a tunnel inside the root tissue, which is the primary cause of inviting several soilborne pathogens. Once these pathogens enter the tuber, they become responsible for causing further damage like secondary infection by different pathogenic bacteria and fungi (Onwueme and Charles, 1994). Sweet potato weevil is causing about 50 to 100 % yield loss in the field (Sorensen, 2009)
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