How do you treat leaf curl virus?
Chemical control: Imidacloprid should be sprayed on the entire plant and below the leaves; eggs and flies are often found below the leaves. Spray every 14-21 days and rotate on a monthly basis with Abamectin so that the whiteflies do not build-up resistance to chemicals.
How do you control curled cotton leaves?
Management – Use certified disease free seeds. Ensure weed free field & surroundings. Use resistant or tolerant cultivar. Do not plant cotton crop near tomato and other crops susceptible to whiteflies.
Is cotton affected by the leaf curl virus?
The CLCuD is not seed-borne. It survives on alternative hosts such as tomato, tobacco, hibiscus, okra, and ageratum. Leaf curl-like symptoms have been observed on many herbaceous and woody species in the field including cotton, okra, hibiscus, hemp, sunflower, tobacco, and many weeds (Nour and Nour, 1964).
Is leaf curl of cotton a fungal disease?
COTTON :: MAJOR DISEASE :: LEAF CURL DISEASE It is caused by Cotton leaf curl virus – a begomovirus of family geminiviridae. The virions are typical geminate particles, ss circular DNA, bipartite genome with DNA-A and DNA-B components.
What are the symptoms of cotton leaf curl disease?
The very characteristic symptoms include leaf curling, darkened veins, vein swelling and enations that frequently develop into cup-shaped, leaf-like structures on the undersides of leaves.
How many types of begomoviruses infect cotton?
At least three distinct begomoviruses characterized from the first epidemic; Cotton leaf curl Multan virus, Cotton leaf curl Kokhran virus and Cotton leaf curl Alabad virus, several distinct species of alphasatellites and cotton leaf curl Multan betasatellite were found associated with CLCuD.
What is the symptoms of leaf curl?
Symptoms of leaf curl appear in the spring. Developing leaves become severely distorted (thickened and puckered), and have a reddish or purple cast. Later, as spores form on the leaf surface, the leaves become powdery gray in color. Shortly after this, the leaves turn yellow or brown and drop.
What is the history of cotton leaf curl disease in Pakistan?
The present epidemic of cotton leaf curl disease (CLCuD) originated in the Punjab region near the city of Multan and was first reported in 1985, although it was noted in this region as early … Cotton is one of the most important crops of Pakistan, accounting for over 60% of foreign exchange earnings.
What is cotton leaf curl disease resistance?
Resistance to the Cotton leaf curl complex and other begomoviruses of cotton Disease resistance is the only effective way of managing leaf curl disease, particularly when infection occurs early and routinely in the production season.
What is Indian cotton leaf curl virus (clcuv-hs2)?
Molecular cloning of coat protein gene of an Indian cotton leaf curl virus (CLCuV-HS2) isolate and its phylogenetic relationship with others members of Geminiviridae. Virus Genes, 30 (1):85-91 Radhakrishnan G, Malathi VG, Varma A, 2004.
What causes mild transient symptoms in cotton with New Delhi virus?
Tomato leaf curl New Delhi virus DNA A component and cotton leaf curl Multan betasatellite can cause mild transient symptoms in cotton. Acta Virologica, 54 (4), 317-318. doi: 10.4149/av_2010_04_317