Growth and Yield Attributes of Groundnut (Arachis hypogaea L.) as Influenced by Tank-mix Application of Early Post Emergence Herbicides

Abstract

Background: Groundnut or peanut (Arachis hypogaea L.) is known as the ‘king’ of oilseeds. It is one of the most important food and cash crop of India. Among different constraints that limit the productivity of groundnut, weed menace is one of the serious bottlenecks. A field experiment was conducted at Perunthalaivar Kamaraj Krishi Vigyan Kendra, Puducherry during 2019 to 2020 to study the tank mix application of post-emergence herbicides for efficient weed control in Groundnut. Methods: The experiment was laid out in randomized block design with 13 treatments and replicated thrice. The treatments consisted of weed management practices viz., pre emergence herbicide pendimethalin and post emergence herbicide viz., imazethapyr, quizalofop-ethyl and those herbicides used either alone or combined with hand weeding once. In addition, hand weedings twice at 15 and 30 DAS were tested with unweeded check. Result: The experiment results of the two years study revealed that the Pendimethalin @ 1.5 kg ai ha-1 (PE) + tank mix of Imazethpyr (40%) + Quizalofop ethyl (60%) at 20-30 DAS recorded maximum plant height (58.17 cm), DMP (36.81 g plant-1), Significantly higher pod yield (3752 kg ha-1), highest net income (₹ 90,762 ha-1) and B:C ratio (2.80). Correlation and Regression analysis also indicated that the yield attributes had a positive impact on groundnut yield.

Forage Nutritive Quality, Yield and Quantitative Analysis of Leguminous Fodder Cowpea-Maize System as Influenced by Integrated Nutrient Management in Southern Zone of India

“…The research methodology utilized a two-pronged strategy, involving both correlation analysis and multiple linear regressions, to investigate the intricate relationships between various plant characteristics and the green fodder yield of cowpea and maize. Correlation analysis, a crucial statistical technique, was employed to assess the degree of association among different variables (Ravi et al, 2023). Specifically, the Pearson correlation coefficient (PCC) was used to precisely gauge the strength and direction of these relationships (Aj aykumar et al, 2022).…”

Quantitative Variables Analysis, Growth and Yield of Groundnut (Arachis hypogaea L.) under Different Weed Management Practices

“…The observed outcome could be attributed to the synergistic impact of pre-emergence and early postemergence herbicides, which effectively limit the early establishment of weeds in groundnut fields. Moreover, groundnut's ability to smother weeds contributes significantly to this effect (Ravi et al, 2023).…”

“…The maximum yield reduction (2904 kg/ha) was observed with weedy check. Groundnut being a deep rooted legume crop proliferation of the root at early stage is essentially required to establish the sufficient numbers of nodule and better crop growth for pegging (Ravi et al, 2023). W eed growth is faster than crop growth at early stage so controlling of weeds at early stage reduced the crop weed competition and thus providing nutritional security to the crop as result of better pod yield.…”

“…These methods also require frequent repetition at regular intervals. Manual weeding, in particular, may not always be feasible due to the high demand for labor and the challenges posed by heavy rainfall during the monsoon season, leading to intensified weed competition (Ravi et al, 2023). Hence, chemical weed control is often seen as a viable alternative for efficient and cost-effective weed management.…”