Effect of planting seasons and the associated weather conditions on the incidence of the rice gall midge pachydiplosis oryzae (Wood-Mason)

Authors

  • B. THOMAS
  • C. C. ABRAHAM
  • K. KARUNAKARAN
  • R. GOPALAKRISHNAN

DOI:

https://doi.org/10.54302/mausam.v26i2.2172

Keywords:

Rice Research, Pattambi (Kerala), Pachydiplosis oryzae

Abstract

Studies were carried out at the Rice Research Station, Pattambi (Kerala) to ascertain the extent of damage caused by the rice gall midge Pachydiplosis oryzae (Wood-Mason) to IR. 8-paddy crop planted at different fortnightly intervals during 1987-6g to 1971-72. The Influence of rainfall, relative humidity, minimum and maximum temperatures on infestation by the pest was also investigated. The pest incidence was found to be maximum and sharp decline for crops planted in June and first fortnight of July respectively, on the basis of the occurrence of silver shoots at 45 days after planting.

The percentage incidence of silver shoots caused by the pest is correlated positively with rainfall and negatively with maximum temperature. Partial correlation studies have revealed the Independent Influence of rainfall and maximum temperature on gall midge infestation.

Downloads

Published

01-04-1975

How to Cite

[1]
B. . THOMAS, C. C. . ABRAHAM, K. . KARUNAKARAN, and R. . GOPALAKRISHNAN, “Effect of planting seasons and the associated weather conditions on the incidence of the rice gall midge pachydiplosis oryzae (Wood-Mason)”, MAUSAM, vol. 26, no. 2, pp. 237–240, Apr. 1975.

Issue

Vol. 26 No. 2 (1975): MAUSAM

Section

Shorter Contribution

License

Copyright (c) 2021 MAUSAM

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

All articles published by MAUSAM are licensed under the Creative Commons Attribution 4.0 International License. This permits anyone.

Anyone is free:

  • To Share - to copy, distribute and transmit the work
  • To Remix - to adapt the work.

Under the following conditions:

  • Share - copy and redistribute the material in any medium or format
  • Adapt - remix, transform, and build upon the material for any purpose, even
    commercially.