Project

Evaluation of different Neem formulations for dosage rationalization in cotton in south India.

Objective

To critically evaluate the efficacy of different commercial formulations for its efficacy on cotton pest complex and to fix optimum dose levels of different Aza containing  formulations for dose rationalization for the user's benefit and help improve IPM program in cotton.

Project sponsor

Neem expert group constituted by Plant  Protection Advisor, Government of India.

Project investigator

Dr.P.Bhaskaran
Dean, Faculty of Agriculture
Annamalai University
Chidambaram, Tamil Nadu, India

Project monitoring
Authority

Dr. V.Raghunathan
Member, Neem expert Group
Chennai

Crop

Cotton

Variety

RCH-2

Location

Pathimapuram

Date of sowing

25.08.99

Plot size

7 x 5 sq.m

Doses/Treatments

Table

Products Tested

300 ppm and 1500 ppm  Azadirachtin formulation's (Table-1)

Number of sprays

Results

The results of the experiment proved that 300 ppm formulation offered good crop protection and resulted in high yield at a dose of 2.5 Lt/Ha uniformly across formulations delivered good efficacy and yield at 2.5 Lt/Ha dose levels .The experiments clearly showed significant dose dependent yield improvement at 0.625 ,1.25 and 2.5 Lt/Ha implying that the moderate dose level of 2.5 Lt/Ha  provided commercially acceptable crop protection and yield improvement.

Conclusions

Recommendations

It is recommended that both 300 and 1500 ppm Azadirachtin .formulation doses  to be fixed at 2.5 Lt/Ha as it proved to be the best dose levels  across various formulation tested.

Further
Experiments

Further experiments will be conducted to verify the results as well as intermediate doses during 2000-2001.

Acknowledgement

Neem expert Group ,principal investigator and coordinator would like to thank  the industry participants for their interest and extending necessary help.