Varietal Screening of Rice Panicle Mite in Relation to Morphological Characters of Leaf Sheath and Population in 5 major Rice Growing districts of West Bengal

Author: Sugandha Mukhopadhyay*, Kinkar Saha** and Salil Kumar Gupta***

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Abstract

This paper deals with varietal screening in relation to morphological characters of leaf sheath in respect of 29 rice cultivars of early and mid-early duration of rice crop regarding population/2 sq. cm. area of leaf sheath, length of flag leaf, length of panicle and % of chaffy grain. In addition, results of studies on population of panicle mite on 8 median rice cultivars, 10 late duration rice cultivars and 11 long duration rice cultivars are also discussed. Besides, it also includes results regarding population of rice panicle mites in 5 rice growing districts of West Bengal.

Keywords

Rice panicle mite, Steneotarsonemus spinki, varietal screening, morphological characters, West Bengal.

Conclusion

This paper deals with varietal screening in relation to morphological characters of leaf sheath in respect of 29 rice cultivars of early and mid-early duration of rice crop regarding population/2 sq. cm. area of leaf sheath, length of flag leaf, length of panicle and % of chaffy grain. In addition, results of studies on population of panicle mite on 8 median rice cultivars, 10 late duration rice cultivars and 11 long duration rice cultivars are also discussed. Besides, it also includes results regarding population of rice panicle mites in 5 rice growing districts of West Bengal.

References

The rice panicle mite, Steneotarsonemus spinki is presently becoming an important pest of rice in many of the rice growing areas of the world. This mite feeds on the ad-axial surface of the leaf sheath and is known to cause sterile grain syndrome producing loose and brownish flag leaf sheath, twisted panicle neck, impaired grain development with empty or partially filled grain having brownish spots and the loss is reported to be to the tune of 20-25%. Earlier, this mite was not of much problem in West Bengal though, of course, it was a menace in many parts of South India. In West Bengal, this occurs in East and West Midnapore district, South and North 24 Parganas, Hooghly and Nadia. Many of the farmers are not familiar with the symptoms of the mite menance and therefore often does not take adequate measure for its control which cause further yield loss. In order to survey the occurrence of this mite in different districts of West Bengal along with its relationship with late and long d

How to cite this article

Sugandha Mukhopadhyay, Kinkar Saha and Salil Kumar Gupta (2017). Varietal Screening of Rice Panicle Mite in Relation to Morphological Characters of Leaf Sheath and Population in 5 major Rice Growing districts of West Bengal , Biological Forum – An Inter