30-10-2020

भाकृअनुप - भारतीय मक्का अनुसंधान संस्थान

ICAR - Indian Institute of Maize Research

(ISO 9001:2015 certified)

Nurturing Diversity, Resilience, Livelihood & Industrial Inputs

Tamil Nadu

State recommendation for pest and disease management
State: Tamil Nadu
Pest management

Information on
state
recommendations
The State Dept. of Agriculture is following the IPM Technology Capsule developed by Centre for Plant Protection Studies, TNAU, Coimbatore
Fall armyworm The Integrated Pest Management technology capsule involves the following components Application of critical input neem cake (500 kg/ha) at the time of last ploughingrogue spacing (75 cm for every 10 rows)mass trapping with pheromone traps (50/ha)border cropping with eco-feast crops like cowpea, sunflower and gingelly for encouraging natural enemy fauna andwindow based insecticide application (as follows) Early whorl stage (15 – 20 DAS) Azadirachtin 1% EC 1000 ml/haEmamectin benzoate 5 SG 200 g/haNovaluron 10 EC 750 ml/ha Late whorl stages (40-45 DAS) Metarhizium anisopliae @ 1 x 108 cfu/g @ 4 kg/haSpinetoram 12 SC  250 ml/haThiodicarb 75 WP 1 kg/haFlubendiamide 480 SC 150 ml/haChlorantraniliprole 18.5 SC 250 ml/ha The insecticides meant for the second window can be applied on a need basis during tassel/ cob formation stage
Shoot fly
(Atherigona orientalis )  
Mix 10 g of imidacloprid 48% FS or imidacloprid 70% WS or 8 g of thiamethoxam 30% FS per kg of seed and shade dry. Set up the TNAU low cost fish meal trap 12/ha till the crop is 30 days old. Apply any one of the following insecticides: Carbofuran 3%CG 33.3 kg/ha or Dimethoate 30%EC or 1155 ml/ha or Monocrotophos 36% SL @ 625 ml/ha.  
Stem borer (Chilo partellus)   Release egg parasitoid Trichogramma chilonis @ 12 cc/ha coinciding egg laying period thrice at weekly interval. Conserve the larval parasitoid Cotesia flavipes. Carbofuran 3% CG @33.3 kg/ha may be applied. If granular insecticides are not used, dimethoate 30% EC 660 ml/ha may be sprayed.

Disease management

Downy mildew or
Crazy Top
(Peronosclerospora Sorghi)
Sow resistant hybrid TNAU maize hybrid CO-6 and COH (M) 8Rogue out downy mildew infected plantsSpray metalaxyl + mancozeb @ 1000 g or mancozeb 1000 g/ha at 20 days after sowing CIB recommendation Treat the seeds with metalaxyl-M 31.8% ES @ 2.4 ml/kg seed or with metalaxyl 35% WS @ 700gms with a dilution of 0.75 to 1ltr / 100 kg seeds.
Turcicum leaf blight:
(Exserohilum turcicum) and Maydis leaf blight:(Helminthosporium maydis)
Spray mancozeb or zineb @ 2-4 g/l on appearance of the disease and repeat at 10 days interval, if necessary seed treatment with Pseudomonas fluorescens @ 10g/ kg and spray propiconazole 25% EC @ 0.1% on 35 and 50 DAS CIB recommendation Spray kresoxim-methyl 44.3% SC @ 1 ml/ l of water
Post Flowering Stalk rot: (Macrophomina phaseolina) Follow crop rotationAvoid water stress at flowering time to reduce the disease incidenceAvoid nutrient stress and apply potash @ 80 kg/ha in endemic areasApply P. Fluorescens or T. asperellum @ 2.5 kg / ha with 50 kg of well decomposed FYM / sand in soil at 30 days after sowing CIB recommendation for combined infections Spray azoxystrobin 18.2% w/w + cyproconazole 7.3% w/w SC @ 1l/ha to control downy mildew, leaf blights and rust diseasesSpray azoxystrobin 18.2% w/w + difenoconazole 11.4% w/w SC @ 0.1% to control leaf blights and downy mildew diseases