Control of

1. A method of controlling a Spodoptera frugiperda insect pest, comprising applying to a plant surface an isolated Txp40 protein or a variant thereof comprising an amino acid sequence selected from the group consisting of:

a) an amino acid sequence having at least 97% identity to SEQ ID NO: 81 and retaining the alanine residue at position 119;

b) an amino acid sequence having at least 97% identity to SEQ ID NO: 89 and retaining the alanine residue at position 213; and

c) an amino acid sequence having at least 97% identity to SEQ ID NO: 127 and retaining the alanine residues at positions 119 and 213.

2. The method according to claim 1 , wherein said Spodoptera frugiperda insect pest is resistant to a Cry protein and/or a Vip3 protein.

3. The method according to claim 2 , wherein said Vip3 protein is a Vip3A protein.

4. The method according to claim 2 , wherein said Cry protein is a Cry1A, a Cry1B, a Cry1C, a Cry1D, a Cry1F, a Cry1J or a Cry2A protein.

5. The method according to claim 1 , wherein said Spodoptera frugiperda is contacted with a Cry protein and/or a Vip3 protein in addition to said Txp40 protein or variant thereof.

6. The method according to claim 5 , wherein the Cry protein and/or the Vip3 protein is selected from the group consisting of a Cry1A, Cry1B, Cry1C, Cry1D, Cry1F, Cry2A and a Vip3 protein.

7. An insecticidal protein comprising the amino acid sequence of SEQ ID NOs: 74-93, 95-113, 116-119, or 123-136.

8. A transgenic plant infestable by a fall armyworm ( Spodoptera frugiperda ) insect pest and which is protected from said insect pest by being stably transformed with at least one nucleic acid molecule encoding a Txp40 protein or a variant thereof comprising an amino acid sequence selected from the group consisting of:

a) an amino acid sequence having at least 97% identity to SEQ ID NO: 81 and retaining the alanine residue at position 119;

b) an amino acid sequence having at least 97% identity to SEQ ID NO: 89 and retaining the alanine residue at position 213; and

c) an amino acid sequence having at least 97% identity to SEQ ID NO: 127 and retaining the alanine residues at positions 119 and 213.

9. A transgenic plant infestable by a fall armyworm ( Spodoptera frugiperda ) insect pest and which is protected from said insect pest by being stably transformed with at least one nucleic acid molecule encoding an insecticidal protein of claim 7 .

10. The transgenic plant according to claim 8 , wherein said plant is a corn plant.

11. The transgenic plant according to claim 8 , wherein the fall armyworm pest is resistant to a Cry1F protein or a Vip3 protein.

12. A codon-optimized nucleotide sequence encoding a Txp40 protein or variant thereof comprising an amino acid sequence selected from the group consisting of:

a) an amino acid sequence having at least 97% identity to SEQ ID NO: 81 and retaining the alanine residue at position 119;

b) an amino acid sequence having at least 97% identity to SEQ ID NO: 89 and retaining the alanine residue at position 213; and

c) an amino acid sequence having at least 97% identity to SEQ ID NO: 127 and retaining the alanine residues at positions 119 and 213;

and wherein said codons are optimized for expression in a corn plant.

13. The codon-optimized polynucleotide according to claim 12 , wherein the nucleotide sequence comprises SEQ ID NOs: 18, 26, or 64.

14. A method of mitigating the development of resistance to a Vip3 protein or a Cry1F protein in a population of fall armyworm ( Spodoptera frugiperda ), the method comprising delivering to the fall armyworm population or an environment thereof a transgenic plant comprising a polynucleotide encoding a Txp40 protein or variant thereof comprising an amino acid sequence selected from the group consisting of:

a) an amino acid sequence having at least 97% identity to SEQ ID NO: 81 and retaining the alanine residue at position 119;

b) an amino acid sequence having at least 97% identity to SEQ ID NO: 89 and retaining the alanine residue at position 213; and

c) an amino acid sequence having at least 97% identity to SEQ ID NO: 127 and retaining the alanine residues at positions 119 and 213;

and a polynucleotide comprising a nucleotide sequence encoding a Vip3A protein or a nucleotide sequence encoding a Cry1F protein; wherein the Txp40 protein or variant thereof and the Vip3 protein or the Cry1F protein are produced in the transgenic plant.

15. A method for producing corn protected against fall armyworm ( Spodoptera frugiperda ), comprising: (a) introducing into a corn plant a polynucleotide encoding a Txp40 protein or variant thereof comprising an amino acid sequence selected from the group consisting of:

i) an amino acid sequence having at least 97% identity to SEQ ID NO: 81 and retaining the alanine residue at position 119;

ii) an amino acid sequence having at least 97% identity to SEQ ID NO: 89 and retaining the alanine residue at position 213; and

iii) an amino acid sequence having at least 97% identity to SEQ ID NO: 127 and retaining the alanine residues at positions 119 and 213;

(b) planting said corn plant or a progeny of said corn plant in a field infestable by a fall armyworm insect pest, wherein said corn plant or said progeny expresses said Txp40 protein.

16. The method according to claim 15 , wherein said introducing step is accomplished by a) transforming a corn cell with said polynucleotide and regenerating a corn plant that expresses said Txp40 protein or variant thereof; or b) crossing a first corn plant comprising said polynucleotide with a second corn plant, resulting in a progeny corn plant that expresses said Txp40 protein or variant thereof.

17. The method according to claim 1 , wherein the applying is spraying.