Q.6
ICAR AIEEA PG Agronomy 09 July 2023 (Shift 1) Paper (Q.63)
Match the Following +4 −1
English हिन्दी
Match herbicides with their first use/testing or synthesis :

Choose the correct answer from the options given below :

शाकनाशियों (Herbicides) को उनके प्रथम उपयोग/परीक्षण अथवा संश्लेषण वर्ष के साथ सुमेलित कीजिए :

नीचे दिए गए विकल्पों में से सही उत्तर का चयन कीजिए :

List - I सूची - I
Herbicide शाकनाशी
List - II सूची - II
First synthesis/use/testing प्रथम संश्लेषण/उपयोग/परीक्षण
A Glyphosate ग्लाइफोसेट (Glyphosate) I 1995 1995
B 2, 4-D 2, 4-D II 1971 1971
C Diclosulam डिक्लोसुलम (Diclosulam) III 1958 1958
D Atrazine एट्राजीन (Atrazine) IV 1944 1944
EXPLANATION Chemical Control: Classification of Herbicides (Selectivity, Application Timing, Chemical Families)
  • Glyphosate herbicidal activity was discovered in 1970 and patented/field tested widely starting in 1971 by John E. Franz of Monsanto -> (A) - (II).
  • 2,4-D selective weed killing properties were recognized independently during World War II and published in 1944 by Marth and Mitchell -> (B) - (IV).
  • Diclosulam (a triazolopyrimidine sulfonamide herbicide for broadleaf control in legumes) was synthesized and introduced in 1995 by Dow AgroSciences -> (C) - (I).
  • Atrazine (a symmetrical s-triazine herbicide) was synthesized and patented in 1958 by J. R. Geigy Ltd. -> (D) - (III).

    Matching sequence: (A) - (II), (B) - (IV), (C) - (I), (D) - (III), corresponding to Option 2.
  • ग्लाइफोसेट (Glyphosate) के शाकनाशी गुणों की खोज 1970-1971 में मोनसेंटो के जॉन ई. फ्रांज़ द्वारा की गई -> (A) - (II)।
  • 2,4-D के चयनात्मक खरपतवारनाशी गुणों का सफल परीक्षण एवं प्रकाशन 1944 में मार्थ और मिशेल द्वारा किया गया -> (B) - (IV)।
  • डिक्लोसुलम (Diclosulam) का विकास और परिचय 1995 में डॉव एग्रोसाइंसेज द्वारा किया गया -> (C) - (I)।
  • एट्राजीन (Atrazine) को 1958 में जे. आर. गीगी कंपनी द्वारा पेटेंट और पेश किया गया -> (D) - (III)।
अतः सही सुमेलन (A) - (II), (B) - (IV), (C) - (I), (D) - (III) है, जो विकल्प 2 में दिया गया है।
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