Agri 2022

D J Patel

D J Patel, Speaker at Agriculture Conferences 2022
Anand Agricultural University, India
Title : Soil fumigation with dazomet and metham -sodium for manangement of root- knot nematodes in protected cultivation


Phytonematodes are microscopic ubiquitous browsers of plants. Among 10 % of 30,000 parasites identified so far, root- knot nematodes ( Meloidogyne incognita and M. javanica) are attacking almost all  agricultural and horticultural crops across the country. These root- knot nematodes have more than 3000 host plants. About 125million dollars are estimated to be lost due to different plant parasitic nematodes globally. Among different agricultural and horticultural crops, horticultural crops are more prone to phytonematodes. Because of the most congenial conditions prevailing in  protected cultivation/ poly houses, plant parasitic nematodes especially root- knot nematodes ( Meloidogyne spp.) become more aggressive on crops like cucumber, capsicum, gerbera, carnation  and  other flowering plants, tomato and many vegetable crops grown in it. If nematodes attack in the early crop growth stage., then crop is totally failed incurring heavy financial losses to the farmers. In the first year, farmers may harvest good production  but nematodes infection will  certainly be there which is generally not noticed by farmers as no clear symptoms are visible on the crop by the farmers e.g. cucumber, capsicum, etc. However when farmers grow second crop either cucumber or capsicum without taking any control measures, then the entire crop  gets failed due to severity of nematode infection. Therefore, there is a need to fumigate soils of poly houses with effective soil fumigants to bring down nematode population and subsequently, it should be fumigated every alternative year to manage nematodes in order to get desired and profitable crop production.

Among 8 different treatments including soil fumigation with metham- sodium and formalin  tried on tomato, capsicum and carnation in poly houses at SKSHPAU, Palampur (HP),MPKV, Rahuri ( MS) and  UAS, GKVK, Bangalore ( Karnataka) respectively, soil fumigation with Metham-Sodium @ 30 ml/m2 alone or in combination with neemcake @ 200 g/ m2 enriched with either Purpureocillium lilacinum  or Pseudomonas fluorescens reduced root- knot infection by 95.45 % and there by increased tomato production by 100.91 % (ICBR : 1:3.38) over control- untreated check at Palampur. Similarly at Rahuri also, there was 54.6 % reduction in root- knot disease with 32.84  % increase in yield of capsicum (ICBR : 1:2.58). The same treatment on  when tried  on carnation at Bangalore also could check root- knot disease by 68.16 % and there by increased  361.65% flower production over control. However .soil fumigation with Formalin even @ 225 ml/m2 alone on in combination with neem cake  enriched with either bio agents was not effective and was almost at par with control treatment for nematode management in tomato, capsicum and carnation at respective center. During 2013-14 and 2014-15, experiments conducted to manage root- knot nematodes through soil fumigation with Dazomet and Metham Sodium on tomato and cucumber in poly houses at CSKHPAU, Palampur in  poly houses indicated that soil fumigation  with Dazomet and Metham Sodium each @ 40 g or ml/ m2 significantly reduced root- knot disease by 78.3  %  and  74.7 %  with  110.9 % (ICBR 1:4.38)   and  144.2 % ( ICBR: 1:5.69) increase in yields of tomato  respectively. While  Dazomet and Metham Sodium each @ 40 g or ml/ m2 significantly reduced root- knot disease by 74.0 %  and  74.2%  with  63.7 % (ICBR 1:3.76)   and  65.1 % ( ICBR: 1:3.84) increase in yields of cucumber  respectively.

It is, therefore, advised that farmers must go for  soil fumigation either with   Dazomet or Metham Sodium before taking any crop in protected cultivation.


Born on June 5, 1944 at village Sapawada, Ta. Idar, Dist. Sabarkantha.  Received B. Sc.( Agri.) degree  with first class in 1967 and M. Sc.( Agri.) & Ph.D. in Plant Pathology  with  specialization in Plant Nematology with first class in 1972 & 1976 as in-service. Joined as Senior Research Assistant ( Plant Pathology) in Bidi Tobacco Research Station, Institute of Agriculture, Anand on June28,1967. Subsequently served as Instructor in Plant Protection, Nematologist, Professor& Head, Dept. of Nematology, In Charge Director of Campus at Anand & Navsari and retired as Principal & Dean, B. A. College of Agriculture, AAU, Anand on June 30, 2004 after serving for 38 years in the fields of education, research, extension education and administration   in  Agriculture. Published 240 research papers in national and international journals, 9 book  chapters, 3 bulletins & 3 review articles. Received 4 national and international  trainings in Nematology.   Presented 148 research papers in national & international seminars, attended 93 national & international workshops/seminars/symposia, 22 memberships in scientific societies. Received 10 awards/medals, served in more than 24 scientific & educational institution, worked as Presidents of Nematological society of India & Indian Society of Mycology & Plant Pathology. Worked as expert s inscientific panels, members of several QRTs, Chairman  of QRT on AICRP ON Nematodes. Guided 8 M.Sc.( Agri.) and  6 Ph.D. students in Plant Nematology. Delivered   several radio talks/ door darshan programs for farmers. Organized several scientific seminars/ workshops/ farmer’s  training programs. Visited USA, UK, Germany, Israel, China, Uganda, Kenya , Malawi, Tanzania Nepal. Presently working as advisors/consultants in few firms.

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