A field experiment was conducted in Instruction-cum-Research Farm of Assam Agricultural University, Jorhat district, Assam, India during 2014-15 and 2015-16 to identify a suitable combination of ginger and cowpea intercropping and weed management practice to effectively manage the weeds in ginger. A total of 16 numbers of treatment combinations were considered, comprising 4 legume inter-cropping systems and 4 weed management practices. Intercropping of legume crop Cowpea either in between rows of Ginger and incorporated at 40 days after sowing (DAS) or in between alternate rows of Ginger and incorporated at 40 days after sowing (DAS) and pre-emergence application of Metribuzin 500 g ai ha-1 + hand weeding (HW) at 70, 100 and 140 days after planting (DAP) recorded better results in terms of ginger growth and rhizome yield.

The potential yield loss of 15-25% rice production is noticed due to different pest infestation in South Asian countries. This is due to the favorable climatic conditions for pests. It compels farmers to use a major chunk of pesticides to prevent/recover from pest attack. Hence, the field experiments were carried out to test the insecticide, Chlorantraniliprole 625 g/L FS as seed treatment formulation. It is evident from the studies undertaken during rabi 2018-19 and kharif 2018, that Chlorantraniliprole provided excellent control over yellow stem borer and leaf folder in conventional variety of rice (CR Dhan 304) and hybrid rice (28P67). Among the different doses, Chlorantraniliprole @ 75.0 g a.i/ha recorded significantly better control registering least dead heart of 5.41, 4.77, 3.43, 2.98% and 2.47% at 14, 21, 28, 35 and 42 days after transplanting, respectively. Similarly for Hybrid (28P67) trial the treatment recorded the least count of leaf folder with 0.57, 0.68, 0.74, 0.81 and 0.89 larvae/hill during the intervals of 14, 21, 28, 35 and 42 days after transplanting, respectively and the highest yield (5.46 t/ha) was registered in treatment which was significantly superior over the other entire dose rates of Chlorantraniliprole and the market standard. Thus, from this study, Chlorantraniliprole @ 75 g a.i /ha can be recommended for controlling stem borer and leaf folder in paddy (both for conventional variety and hybrid).

A study was initiated in Instruction-cum-Research Farm of Assam Agricultural University, Jorhat-13, Assam, India during 2014-15 and 2015-16. The objective of this experiment is to understand the impact of legume intercropping system in combination with different weed management practices on the growth indices of ginger crop. Nadia, a commercially grown variety of ginger in Assam was examined in the current study. A total of 16 treatment combinations were considered which comprised of 4 intercropping systems along with 4 weed management practices. Amongst the legume intercropping, Cowpea in between rows of Ginger; incorporated at 40 days after sowing (DAS) and Cowpea in alternate rows of Ginger; incorporated at 40 DAS recorded better results in terms of Leaf area index (LAI), Crop growth rate (CGR), Absolute growth rate (AGR) and yield of Nadia variety ginger. Whereas amongst the weed management practices, pre-emergence application of Metribuzin 500 g ai ha-1 + hand weeding (HW) at 70, 100 and 140 days after planting (DAP) scored higher in growth indices and ginger yield, but neither the legume intercropping systems nor the weed management treatments had any significant impact on harvest index.

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