Paper Details

PJB-2018-1106

TRANSMISSION OF BANANA BUNCHY TOP VIRUS (BBTV) BY HYSTERONEURA SETARIAE (THOMAS) APHIDS FROM PASPALUM CONJUGATUM BERGIUS WEEDS

SURYA SILA
Abstract

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This research was conducted to determine the ability of H. Setariae aphids living on the weeds to transmit the dwarf disease. Cavendish bananas were placed in aphids-free gauze box with a length of 120 cm, a width of 120 cm and a height of 110 cm. Then, P. conjugatum weeds inhabited by 14-16 aphids were picked and transmitted to the healthy Cavendish bananas. When infested, the aphids were seen away from the bananas. The second transmission was done by placing a tray filled with water and then Cavendish bananas were placed in the middle of the tray to prevent the movement of aphids from the banana plant and P. conjugatum cultivation around the Cavendish as a temporary source of food for the aphids. After 10 – 20 days, the P. conjugatum weeds were removed and cleaned around the banana so that the aphids moved to and sucked on the Cavendish bananas. The symptoms of dwarf on the Cavendish banana plant appeared on 41 days after the transmission, including the shrunken, stiff, and degenerated leaves. Additionally, the edges of the leaves turned yellow, gradually discoloring into brown. The plant became stunted and experienced stagnant growth. If seen from the lower portion of the leaf lamina and midrib, there were rather dark green lines dotted like “Morse code”. Finding research, decline in the growth of Cavendish banana plants due to the dwarf disease was very significant, reaching 45.8% of the plant height, 47.7% of the leaf length, 47.1% of the leaf width and 26.1% of the canopy. The DAS-Elisha test on wild dwarf banana plants showed a positive result of BBTV with an absorbance value of 0.248 nm (the K- value of 0.118 and K+ of 1.267 nm).

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