NOVELTY - Carboxamide derivatives are new.    USE - In compositions useful for controlling or preventing infestation of useful plants by phytopathogenic microorganisms; and for protecting useful plants from phytopathogenic microorganisms (claimed), such as fungi, bacteria or viruses. The compounds (I) are also useful as dressing agents for the treatment of plant propagation material, in particular of seeds (fruit, tubers, grains) and plant cuttings (e.g. rice), for the protection against fungal infections as well as against phytopathogenic fungi occurring in the soil; for protecting technical materials, including wood and wood related technical products; and in food storage or in hygiene management. The phytopathogenic fungi include e.g. Botrytis, Pyricularia, Helminthosporium, Fusarium, Septoria, Cercospora and Alternaria; and Basidiomycetes e.g. Rhizoctonia, Hemileia, and Puccinia. Additionally, the compounds (I) are also useful against Ascomycetes e.g. Venturia and Erysiphe and Oomycetes e.g. Phytophthora, Pythium, and Plasmopara. Furthermore, the compounds (I) are useful against phytopathogenic bacteria and viruses including Xanthomonas, Pseudomonas, Erwinia amylovora as well as against the tobacco mosaic virus. The useful plants to be protected comprise: cereal (wheat, barley, rye, oat, rice, maize, sorghum and related species); beet (sugar beet and fodder beet); pomes, drupes and soft fruit (apples, pears, plums, peaches, almonds, cherries, strawberries, raspberries and blackberries); leguminous plants (beans, lentils, peas, soybeans); oil plants (rape, mustard, poppy, olives, sunflowers, coconut, castor oil plants, cocoa beans, groundnuts); cucumber plants (pumpkins, cucumbers, melons); fiber plants (cotton, flax, hemp, jute); citrus fruit (oranges, lemons, grapefruit, mandarins); vegetables (spinach, lettuce, asparagus, cabbages, carrots, onions, tomatoes, potatoes, paprika); lauraceae (avocado, cinnamomum, camphor) or plants such as tobacco, nuts, coffee, eggplants, sugar cane, tea, pepper, vines, hops, bananas and natural rubber plants, as well as ornamentals. The compounds (I) are also useful for treating and/or preventing microbial infection in animals including insects, mammals, and reptiles, where the infections are caused by e.g. Aspergillus fumigatus, Aspergillus flavus, Candida albicans, Coccidioides immitis; and Cryptococcus neoformans.    ADVANTAGE - The compounds (I) have a very advantageous spectrum of activities for protecting useful plants against diseases that are caused by phytopathogenic microorganisms, such as fungi, bacteria or viruses. The compounds (I) have excellent activity at low rates of application, are well tolerated by plants and are environmentally safe also. They have very useful curative, preventive and systemic properties and are used for protecting numerous useful plants. The compounds (I) inhibit or destroy the diseases that occur on plants or parts of plants (fruit, blossoms, leaves, stems, tubers, roots) of different crops of useful plants, while at the same time protecting also those parts of the plants that grow later e.g. from phytopathogenic microorganisms.    DETAILED DESCRIPTION - Carboxamide derivatives of formula (I) are new.    R1 and R2=H or 1-4C alkyl;or    R1+R2=2-5C alkylene;    R3=H or 3-7C cycloalkyl;    B1=group of formula (i);    R4=H, halogen or 1-6C alkyl;    R5=H or halogen;    R6=H, halogen, 1-6C alkyl, 2-6C alkenyl, 3-6C alkynyl, 3-6C cycloalkyl-3-6C alkynyl, halophenoxy, halophenyl-3-6C alkynyl, C(1-4C alkyl)=NO-1-4C alkyl, 1-6C haloalkyl, 1-6C haloalkoxy, 2-6C haloalkenyl, or 2-6C haloalkenyloxy;    R7=H or halogen;    R8=H, halogen, 1-6C alkyl, or 1-6C alkoxy;    G1=CONH, CH2ON=CH, CH2ON=C(CH3) or CH=NOCH2;    A1=group of formula (ii);    R9=H or 1-4C alkyl;    R10=1-4C alkyl, 1-4C haloalkyl or halogen;and    R11=H or halogen.