Abstract: A method of inhibiting growth of a plurality of plants of a weed species of interest in a growth area is provided. The method comprising, artificially pollinating inflorescences of said plants with pollen that reduces fitness of said plants, said artificially pollinating is performed under pollination conditions that inhibit growth of the plants.

Abstract: Methods of Amaranthus control are provided, comprising, artificially pollinating an Amaranthus species at a growth area with an effective amount of pollen that reduces fitness of the at least one Amaranthus species, the effective amount comprising 1 mg to 1 gram per plant per application using a precision tool-assisted application or 10 gram to 100 kg per acre per application using a non-precision tool-assisted application during a flowering season of the Amaranthus species.

Abstract: Methods of Amaranthus control are provided, comprising, artificially pollinating an Amaranthus species at a growth area with an effective amount of pollen that reduces fitness of the at least one Amaranthus species, the effective amount comprising 1 mg to 1 gram per plant per application using a precision tool-assisted application or 10 gram to 100 kg per acre per application using a non-precision tool-assisted application during a flowering season of the Amaranthus species.

Abstract: A method of weed control is provided. The method comprises artificially pollinating at least one weed species of interest with pollen of the same species that reduces fitness of said at least one weed species of interest. Also provided are compositions and kits which can be used for performing the methods described herein.

Abstract: A method of weed control is provided. The method comprises artificially pollinating at least one weed species of interest with pollen of the same species that reduces fitness of said at least one weed species of interest. Also provided are compositions and kits which can be used for performing the methods described herein.

Abstract: A method of weed control is provided. The method comprising: (a) determining development of flowers of at least one weed species of interest; and (b) artificially pollinating at flowering the flowers of the at least one weed species of interest with pollen that reduces fitness of the at least one weed species of interest. Also provided are systems for executing the method.

Abstract: A method of inhibiting growth of a plurality of plants of a weed species of interest in a growth area is provided. The method comprising, artificially pollinating inflorescences of said plants with pollen that reduces fitness of said plants, said artificially pollinating is performed under pollination conditions that inhibit growth of the plants.

Abstract: Methods of Amaranthus control are provided, comprising, artificially pollinating an Amaranthus species at a growth area with an effective amount of pollen that reduces fitness of the at least one Amaranthus species, the effective amount comprising 1 mg to 1 gram per plant per application using a precision tool-assisted application or 10 gram to 100 kg per acre per application using a non-precision tool-assisted application during a flowering season of the Amaranthus species.

Abstract: A method of weed control is provided. The method comprising: (a) determining development of flowers of at least one weed species of interest; and (b) artificially pollinating at flowering the flowers of the at least one weed species of interest with pollen that reduces fitness of the at least one weed species of interest. Also provided are systems for executing the method.

Abstract: A method of introducing naked dsRNA into a seed is provided. The method comprising contacting the seed with the naked dsRNA under conditions which allow penetration of the dsRNA into the seed, thereby introducing the dsRNA into the seed.

Abstract: A method of producing pollen that reduces fitness of at least one Amaranthus species of interest is provided. The method comprises treating the pollen of plants of an Amaranthus species of interest with an irradiation regimen selected from the group consisting of: (i) X-ray radiation at an irradiation dose of 20-1600 Gy; (ii) gamma radiation at an irradiation dose of 20-2000 Gy; (iii) particle radiation; and (iv) UV-C radiation at an irradiation dose of 100 ?J/cm2-50 J/cm2, with the proviso that when the irradiation is X-ray the irradiation dose is not 300 Gy and wherein when the irradiation is gamma irradiation the irradiation dose is not 100, 300 and 500 G, and wherein when said radiation is UV-C the dose radiation is not 2 J/cm2.

Abstract: A method of weed control is provided. The method comprises artificially pollinating at least one weed species of interest with pollen that reduces fitness of said at least one weed species of interest, the pollen being in a formulation comprising an effective amount of a carbohydrate. Also provided are compositions and kits that can be used for performing the methods described herein.

Abstract: A method of producing pollen that reduces fitness of at least one weed species of interest is provided. The method comprises treating the pollen of plants of a weed species of interest with an irradiation regimen selected from the group consisting of: (i) X-ray radiation at an irradiation dose of 10-1600 Gy; (ii) gamma radiation at an irradiation dose of 10-2000 Gy; (iii) particle radiation; and (iv) UV-C radiation at an irradiation dose of 100 ?J/cm2-50 J/cm2, with the proviso that when said weed is A. palmeri, when said irradiation is X-ray, the irradiation dose is not 300 Gy and wherein when said irradiation is gamma irradiation the irradiation dose is not 100, 300 and 500 Gy, and wherein when said radiation is UV-C the dose radiation is not 2 J/cm2.

Abstract: A method of introducing an exogenous non-transcribable polynucleotide trigger, for example dsRNA, molecule into a seed is provided. The method comprises contacting the seed with the exogenous non-transcribable polynucleotide trigger, for example dsRNA, molecule under conditions which allow penetration of the exogenous non-transcribable polynucleotide trigger, for example dsRNA, molecule into the seed, thereby introducing the exogenous non-transcribable polynucleotide trigger, for example dsRNA, molecule into the seed.

Abstract: A method of weed control is provided. The method comprises artificially pollinating at least one weed species of interest with pollen of the same species that reduces fitness of said at least one weed species of interest. Also provided are compositions and kits which can be used for performing the methods described herein.

Abstract: A method of introducing naked dsRNA into a seed is provided. The method comprising contacting the seed with the naked dsRNA under conditions which allow penetration of the dsRNA into the seed, thereby introducing the dsRNA into the seed.

Abstract: A method of introducing naked dsRNA into a seed is provided. The method comprising contacting the seed with the naked dsRNA under conditions which allow penetration of the dsRNA into the seed, thereby introducing the dsRNA into the seed.

Abstract: A method of introducing naked dsRNA into a seed is provided. The method comprising contacting the seed with the naked dsRNA under conditions which allow penetration of the dsRNA into the seed, thereby introducing the dsRNA into the seed.

Abstract: An isolated dsRNA molecule comprising an antisense RNA sequence for regulating a target gene of interest in a plant or a phytopathogen of the plant, wherein the dsRNA sequence is flanked by two complementary sites to an smRNA or smRNAs expressed in the plant and wherein the dsRNA molecule further comprises a helicase binding site positioned so as to allow unwinding of the strands of the isolated dsRNA molecule to single stranded RNA (ssRNA) and recruitment of an RNA-dependent RNA polymerase so as to amplify the dsRNA molecule in the plant cell and generate secondary siRNA products of the dsRNA sequence.

Abstract: An isolated dsRNA molecule comprising an antisense RNA sequence for regulating a target gene of interest in a plant or a phytopathogen of the plant, wherein the dsRNA sequence is flanked by two complementary sites to an smRNA or smRNAs expressed in the plant and wherein the dsRNA molecule further comprises a helicase binding site positioned so as to allow unwinding of the strands of the isolated dsRNA molecule to single stranded RNA (ssRNA) and recruitment of an RNA-dependent RNA polymerase so as to amplify the dsRNA molecule in the plant cell and generate secondary siRNA products of the dsRNA sequence.