As for this invention, formula (1) (in formula, as for Het, from oxygen, nitrogen and the sulfur independently and it is complex ring of 5 or 6 members who include 1 - 3 hetero atoms which are selected, particular ring is substituted in the basis R 1 - 34 R1 hydrogen, the alkyl which is substituted optionally (C1-4), the formyl, the alkyl C (=0) which is substituted optionally (C1-4), the alkyl C (=0) which is substituted optionally (C1-4) 0, the alkoxy (C1-4) alkyl which is substituted optionally (C1-4) and the allyl which regards optionally, the professional pal gill which is substituted optionally or is areniru which is substituted optionally Each R2 becoming independent, halogen, alkyl, is the alkoxy or is substituted optionally (C1-4) alkoxy (C1-4) which are substituted optionally (C1-4) alkyl which is substituted optionally (C1-4) As for R3, there is 2 rank of thiophene ring or or it is either of 4 rank and 3 - 13 carbon atoms and we are substituted the silicon atom 1 or more, optionally by the halogen atom where and it becomes independent from oxygen, nitrogen and the sulfur optionally and it is the organic basis which includes 1 - 13 hetero atoms optionally is selected and 1 - 4 becomes independent and is selected Each R4, becoming independent, halogen, is C1-3 alkyls, C1-3 halo alkyls, C1-3 alkoxy (C1-3) alkyls or cyano r is 0, 1 or 2 And X 1 types or more including new chemical compound, the new intermediate field which is used O or S is) at the time of manufacturing the chemical compound or that N oxide and these chemical compounds, as a active ingredient it is related to the use of the particular active ingredient in, the agriculture or gardening study in order it controls or to prevent the infection symptom of the plant by the true germ in the agricultural chemical composition which becomes, and the pathogenic microbe, ideally.本発明は、式(1)(式中、Hetは、酸素、窒素及びイオウから各々独立して選択された1~3個のヘテロ原子を含む5又は6員の複素環であり、当該環は1~3個の基R4で置換されておりR1は水素、任意に置換された(C1~4)アルキル、ホルミル、任意に置換された(C1
