<div>Background: Early leaf spot caused by Cercospora arachidicola Hori. is most destructive disease in all the groundnut growing areas of Rajasthan, under severe infestation it cause 30-50% losses in pod yield. Recently, Central Insecticide Board (CIB), Faridabade banned 27 pesticides including some important fungicides which are extensively used in plant disease management. Therefore, in the present investigation, our main emphasis was to find out some new fungicides for management of early leaf spot disease. 
 
Methods: Ten fungicides (hexaconazole 5% EC, difenconazole 25% EC, propiconazole 25% EC, tebuconazole 25.9% EC, trifloxystrobin 25% + tebuconazole 50% WG, mancozeb 50% WP, chlorothalonil 75% WP, carbendazim 50% WP, carbendazim 12% + mancozeb 63% WP and captan 70% + hexaconazole 5% WP) were evaluated against early leaf spot pathogen (C. arachidicola) both in lab as well as in field condition. The experiment was conducted at ARS, SKRAU, Bikaner during Kharif-2019 on most popular cv. HNG-69 in RBD design with the application of foliar spray of ten different fungicides at different concentrations against early leaf spot disease and compared with an untreated control. 
 
Result: Among all the fungicides used in the present investigation, Tebuconazole 25.9% EC was found most effective in inhibiting the mycelial growth of the pathogen followed by trifloxystrobin 25% + tebuconazole 50% WG. Under field condition, it gave maximum (70.73%) disease control with highest pod yield (31.5 q/ha) and net return (Rs 57,500/ha) when applied as foliar spray at 0.1% concentration followed by trifloxystrobin 25% + tebuconazole 50% WG at 0.2%. These treatments can provide an effective and economical management of early leaf spot disease for groundnut cultivators.</div>

​Management of Early Leaf Spot (Cercospora arachidicola) of Groundnut in Rajasthan

<div>Groundnut (Arachis hypogaea L.) is grown globally and it is affected by many widespread diseases and infestations in all the groundnut growing areas. &nbsp;In Eritrea, leaf spot diseases are prevalent that is caused by fungi (Passalora arachidicola and P. personata) and results great losses. Botanical pesticides play an important role to control fungal infections due to their non-phytotoxic and eco-friendly nature. This study intended to evaluate the efficacy of selected botanicals viz., Neem (Azadirachta indica), Melia (Melia azadirach), Lantana (Lantana camara), Datura (Datura metel) and Marigold (Tagetes patula) on plant height, intensity of leaf spots disease and yield of groundnut in Hamelmalo zoba, Eritrea, during 2017-2018. Extract of neem leaves (5.66, 14.10 and 25.38%) showed high significance in plant height after 20, 40 and 60 days, respectively, as compared to untreated control (21.07%) and mancozeb (treated control). The lowest disease intensity was recorded in the application of neem extract (15%w/v) at different days after sowing. However, mancozeb (2 g/liter) was the most effective and followed by Neem &gt; Melia &gt; Lantana showed improvement in plant growth and maximum reduction in disease intensity. The highest reduction rate in &lsquo;disease incidence&rsquo; and &lsquo;disease severity&rsquo; was found in Neem extract application (63.11 and 40.29) after mancozeb (56.52 and 36.18) at 95 DAS at 5% significant level. &nbsp;Among the botanicals, plants treated with Neem extract was observed with highest number of pods (89.45) and yield (98.10 q/ha) followed by Melia (5% w/v) i.e. 87.59 and 95.02 respectively.</div>

Evaluation of Botanicals to Manage Leaf Spots (Passalora arachidicola and Passalora personatum) of Groundnut (Arachis hypogaea L.) in Zoba Hamelmalo Region of Eritrea

​Management of Early Leaf Spot (Cercospora arachidicola) of Groundnut in Rajasthan

Evaluation of Botanicals to Manage Leaf Spots (Passalora arachidicola and Passalora personatum) of Groundnut (Arachis hypogaea L.) in Zoba Hamelmalo Region of Eritrea

Management of Early Leaf Spot (Cercospora arachidicola) of Groundnut in Rajasthan