Sugarcane Sri Lanka

ORIGINAL RESEARCH

Ovipositional Preference of Deltocephalus menoni (Hemiptera: Cicadalidae), Vector of Sugarcane White Leaf Disease in Sri Lanka

K.M.G. Chanchala 1* , V.K.A.S.M.Wanasinghe 1 and B.R. Kulasekara

ABSTRACT

Information on the biology and ecology of Deltocephalus menoni (Homoptera: Cicadelidae), the only vector identified as responsible for spreading the White Leaf Disease (WLD)- causing phytoplasma in sugarcane in Sri Lanka, is essential to develop an effective disease management programme. Laboratory experiments involving choice tests and field studies were conducted at the Sugarcane Research Institute (SRI), Uda Walawe and sugarcane fields in Pelwatte from 2014 to 2017 to find out the ovipositional preference of the vector on six types of soil textures, with filter-mud and/or spent wash incorporation, with polythene mulches and plants mulched with sugarcane trash. The data on the number of eggs in different substrates were collected 14 days after the introduction of the vector. The differences in the number of eggs in different substrates were analyzed by the analysis of variance procedure and Duncan’s multiple range test. The results revealed that the vector preferred sandy loam, fine sand soil, and filter-mud-incorporated soil for laying eggs. Mulching sugarcane trash did not show any significant effect on oviposition. Black and transparent polythene manage the oviposition significantly at the laboratory level but no significant effect of black polythene mulch was recorded under field conditions. Significantly higher rate of oviposition compared to the control recorded in filter-mud and spent wash incorporated fields into the soil. The findings confirmed that more attention should be given to sugarcane crops in the fields with sandy-loam and fine-sand soils in managing the disease. The incorporation of filter mud and spent wash into the soil should be minimised in the fields where WLD incidence is high. Rogueing out of the WLD-infected plants is essential to make the habitat unfavorable for laying eggs by the vector.
Article Info
- Volume: 04
- Issue: 01
- Pages: 25-34
- Corresponding author: g.chanchala@yahoo.com

 

 

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Article history:

Published:  2023
Available online: 2026