Ramandeep Kaur ¹, K. S. Brar ¹, Rabinder Kaur ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana -141004, Punjab, IN

Abstract

An experiment on the management of rice leaf folder and stem borer in two rice varieties, viz., PR 116 and Basmati 386, was conducted in the organic field area of Department of Agronomy and Agromet, PAU, Ludhiana, by comparing three treatments, viz, organic, recommended and integrated practices. Organic practices and integrated practices (seven releases of Trichogramma chilonis and T. japonicum @ 100000 each at weekly interval starting 30 DAT) proved to be effective in the management of rice leaf folder and stem borer in both the rice varieties.

Keywords

Basmati Rice, Egg Parasitoids, Organic Rice, Rice Leaf Folder, Stem Borer.

Full Text

   

Ramandeep Kaur ¹, Jaspal Singh Virk ¹, Neelam Joshi ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana, 141004, Punjab, IN

Abstract

The studies on bio-efficacy of DOR Bt, a Bacillus thuringiensis formulation against rice leaf folder, Cuaphalocrosis mediualis (Guenee) in Punjab were conducted for three years) during 2005 to 2007, Three dosages of DOR Bt (1.0, 1.5 and 2.0 Kg/ha) were applied on appearance of the pest and were compared with chemical control (monocrotophos 36 SI. @1.4 l/ha) and untreated control. After 45 days of transplanting the lowest mean incidence (1.38%) was recorded in higher dose (2,0 kg/ha) of DOR Bt followed by monocrotophos (l.44%) and incidence in these two was significantly lower than all other treatments. After 60 days of transplanting the lowest mean incidence (1.08%) was observed in monocrotophos, which was significantly lower than all other treatments except higher dose (2,0 kg/ha) of DOR Bt (1.11%), which was also significantly lower than all other treatments. The maximum mean yield (61.12 q/ha) was harvested from monocrotophos which was also significantly higher than all other treatments except higher dose (2.0 kg/ha) of DOR Bt (60,75 q/ha). Significantly lower yield was obtained from control plot (53,81%). It can be concluded that DOR Bt @ 2.0 kg/ha was as effective as monocrotophos 36 St. @ 1,4 l/ha in controlling the rice leaf folder and increasing the grain yield of rice.

Keywords

DOR Bt, Rice Leaf Folder, Rice.

Full Text

   

Ramandeep Kaur ¹, K. S. Brar ¹, Jagmohan Singh ¹, Maninder Shenhmar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana-141004, Punjab, IN

Abstract

Bio-intensive pest management of leaf folder and stem borer was demonstrated on basmati rice at village Kami Khera (District Ferozepur), Punjab over 60 hectares during 2002-2005. Bio-intensive management package included one application of cartap hydrochloride, (Padan @ 25 kg/ha) and seven weekly releases of Trichogruimnu cliilonis and T. japonicum @100000/ha each starting from 30 days after transplantation. The mean per cent leaves folded (2.02), dead hearts (3.05), white ears (5.45) and yield (43.99 q/ha) in BPIM were on par with chemical control, (mean per cent leaves folded (1.77), dead hearts (2.62), white ears (4.48) and yield (44.83 q/ha)), and both the treatments were significantly better than control. The cost: benefit ratio was 1:4.01 and 1:4.68 for bio-intensive management practice and chemical control, respectively.

Keywords

Basmati Rice, BIPM, Rice Leaf Folder, Stem Borer, Trichogramma chilonis, T. japonicum.

Full Text

   

M. S. Mahal ¹, V. K. Kajal ¹, Ramandeep Kaur ¹, Rajwant Singh ¹

Affiliations
1 Department Of Entomology, Punjab Agricultural University, Ludhiana, 141 004, Punjab, IN

Abstract

Efficacy of various control measures for the management of leaffolder, Cnaphalocrocis medinalis Guenee and stem borer, Scirpophaga incertulas Walker was evaluated in large scale field trials at farmers' fields in village Karnikhera (Disst. Ferozepur) on Pusa Basmati 1121 during kharif 2003 and 2004. Integration of one application of cartap hydrochloride 4G@ 1.0 kg a.i/ha 30 days after transplanting with weekly tagging of trichocards (Trichogramma chilonis Ishii and T. japonicum Ashmead @ 20,000/0.4ha each) during the crop season was the most effective approach in reducing the leaf folder and stem borer incidence. It gave higher grain yield than the untreated control and non-IPM farmers' fields and also showed maximum cost benefit ratio (1:5.08) as against the recommended three applications of cartap hydrochloride 4G (1:1,81).

Keywords

Basmati Rice, Biological Control, Chemical Control, Cnaphalocrocis medinalis, Non-IPM Farmers Scirpophaga incertulas.

Full Text