The present invention relates to novel bisamide derivatives of formula (I) having insecticidal activity, to processes and intermediates for preparing them, to insecticidal, acaricidal, nematicidal or molluscicidal compositions comprising them and to methods of using them to combat and control insect, acarine, nematode or mollusc pests ##STR00001##
wherein X.sub.0, X.sub.1, X.sub.2, Y.sub.1, Y.sub.2, R.sub.1, R.sub.2, G.sub.1 and G.sub.2, and Q are as described in formula 1 or salts and n-Oxides thereof.

Exemplary methods include a method of stabilizing ploidy including doubling a plant's ploidy, self-fertilizing the doubled plant, and creating an offspring with a germline ploidy of a desired doubled ploidy targeted when doubling the plant's ploidy. Another exemplary method of stabilizing ploidy includes self-fertilizing a haploid plant, and creating an offspring plant with a germline ploidy that is diploid. A further method of stabilizing ploidy includes treating a female microtubule inhibitor treated plant with an ethylene blocker, producing male reproductive organs and pollen by the female microtubule inhibitor treated plant, fertilizing a clone of the female microtubule inhibitor treated plant with the pollen, and producing seeds and/or offspring.

Exemplary methods include a method of stabilizing ploidy including doubling a plant's ploidy, self-fertilizing the doubled plant, and creating an offspring with a germline ploidy of a desired doubled ploidy targeted when doubling the plant's ploidy. Another exemplary method of stabilizing ploidy includes self-fertilizing a haploid plant, and creating an offspring plant with a germline ploidy that is diploid. A further method of stabilizing ploidy includes treating a female microtubule inhibitor treated plant with an ethylene blocker, producing male reproductive organs and pollen by the female microtubule inhibitor treated plant, fertilizing a clone of the female microtubule inhibitor treated plant with the pollen, and producing seeds and/or offspring.