Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Leaf Propagation of Guava for Prevention of Root Knot Nematode
R. Neelavathi 1 , C. Indu Rani 2 , M. Kumar 1 and P. Sridhar 1
T5-33P-1417
1 ICAR-Krishi Vigyan Kendra, Tamil Nadu Agricultural University Tindivanam, Villupuram district
604002, Tamil Nadu, India
2 Horticultural College and Research Institute, Tamil Nadu Agricultural University Coimbatore 641
003, Tamil Nadu, India
Guava (Psidium guajava L.) is cultivated in an area of 2.87 lakh hectares with an annual
production of 43.04 lakh tonnes. It is good for diabetic patients due to the very low glycemic
index and glycemic load of fruits. It is a highly remunerative crop with good management
practices. Recently, it has been affected by the guava root knot nematode, Meloidogyne
enterolobii (Poornima et al., 2016) in major guava growing states of India. The nematode
spreads rapidly and makes the cultivation of guava unviable and unprofitable. The major cause
of the spread of this nematode is through soil along with planting materials. To overcome this,
the production of planting materials without nematode infestation through a suitable
propagation method is very essential. The propagation of guava through leaves and stem
cutting will be highly useful for producing nematode free planting materials. The present study
was conducted in to standardize concentration of Indole Butyric Acid (IBA) and treatment
duration for guava propagation through leaves.
Methodology
The present research work was carried out at ICAR-Krishi Vigyan Kendra, Tamil Nadu
Agricultural University, Tindivanam, Villupuram district, Tamil Nadu during 2021-22. The
experiment was laid out in a Completely Randomized Design with five replications. Just
mature leaves and mature leaves of guava cv. Lucknow 49 were collected and dipped in 1,000
and 2,000 ppm of Indole Butyric Acid for 1 and 2 minutes. After dipping, the guava leaves
were planted in 50 cavity protrays containing well decomposed cocopeat and kept under shade
net. The number of days taken for rooting, rooting percentage, number of roots, number of days
taken for shoot formation and shoot length were all recorded and subjected to statistical
analysis.
Results
The concentration of IBA and treatment duration has significant effects on the number of days
for rooting, rooting percentage, number of roots, number of days taken for shoot formation and
shoot length. Treatment, T 7-Just mature leaves (3 rd leaf from shoot tip) + 2,000 ppm IBA for 1
minute was found to be the best for rooting (37.65days), rooting percentage (81.63%) in guava
leaves followed by T 9- Just mature leaves (3 rd leaf from shoot tip) + 2,000 ppm IBA for 2
minutes. The complete drying of the mature leaves was observed in all treatments. Treatment,
Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment
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