IndexOutOfRangeException error

Can't find nor solve what is causing the error.

IndexOutOfRangeException: Array index is out of range.Arrays.OnTriggerStay(UnityEngine.Collider other) (at Assets/Scripts/Arrays.cs:89)

This is the script using UnityEngine; using System.Collections;

 public class Arrays : MonoBehaviour
 {
     public int numSelectors;
     public int xPosition; //must be rounded to the nearest 10
     public int yPosition;
     public int zRotation;
     public GameObject[] destruct;
     public GameObject[] selectorArr;
     public GameObject selector; //selected in the editor
     public GameObject wirePrefab;
     public bool verticalDirection;
     public bool leftKeyPressed;
     public bool rightKeyPressed;
     public string deactivationName;
     public bool wireSpawned;
     public int total;
 
 
     void Update () {
         if (Input.GetKeyDown (KeyCode.LeftArrow)) {
             //Debug.Log ("left key was pressed");
             leftKeyPressed = true;
             //Debug.Log ("true");
         }
         if (Input.GetKeyUp (KeyCode.LeftArrow)) {
             //Debug.Log ("left key was released");
             leftKeyPressed = false;
             //Debug.Log ("false");
         }
         
         if (Input.GetKeyDown (KeyCode.RightArrow)) {
             //Debug.Log ("right key was pressed");
             rightKeyPressed = true;
             //Debug.Log ("true");
         }
         if (Input.GetKeyUp (KeyCode.RightArrow)) {
             //Debug.Log ("right key was released");
             rightKeyPressed = false;
             //Debug.Log ("false");
         }
     }
 
 
     void Start()
     {
 
     }
 
             void OnTriggerStay(Collider other){
 
         selectorArr = new GameObject[numSelectors];
         for (int i = 0; i < numSelectors; i++) {
             GameObject[]destruct = GameObject.FindGameObjectsWithTag (deactivationName);
             int destructCount = destruct.Length;
 
             if (other.gameObject.tag == "Player") {
                 selector.gameObject.tag = deactivationName;
             if (rightKeyPressed == true) {
                     if (wireSpawned == false) {
 
                     //if (GameObject.Find ("Pfb_PPlateOFF").GetComponent<PresurePlate> ().doorSpawned) { //will check if true
             if (verticalDirection == false) {
             GameObject go = Instantiate(selector, new Vector3((i * 16f) + xPosition, yPosition, -6), Quaternion.Euler(0,0,zRotation)) as GameObject;
             go.transform.localScale = Vector3.one;
             selectorArr[i] = go;
             }
             if (verticalDirection == true) {
                 GameObject go = Instantiate(selector, new Vector3(xPosition, (i * 16f) + yPosition, 0), Quaternion.Euler(0,0,zRotation)) as GameObject;
                 go.transform.localScale = Vector3.one;
                 selectorArr[i] = go;
 
                 }
                         if (destructCount > total) {
                         wireSpawned = true;
                         //Debug.Log("successful spawn");
                         }
             }
                 }
             }
 
             if (leftKeyPressed == true) {
                 if (other.gameObject.tag == "Player") {
                         //if (wireSpawned == true){
 
 
                     Destroy (destruct [i]);
                             wireSpawned = false;
                         //foreach (GameObject goHolder in destruct) Destroy(goHolder);
                         //Destroy(go);
                             //Debug.Log("successful despawn");
 
                         //}
                     }
                 }
 
         }
     }
 
     void OnTriggerExit(Collider other){
         selector.gameObject.tag = ("wire");
     }
 
 }

Assistance and advices would be appreciated.

Thanks