NOW Monitor

NOW MONITOR  NEWSLETTER
NOVEMBER 2009

The 2009 season for monitoring Navel Orange Worm (NOW) was a strange one.   It appeared  for a while as if the NOW had disappeared in mid summer.      

On two of three fields where no NOW sprays have taken place the trap counts for 2009 were about 50% lessthan the trap counts for 2008.     
* This difference was particularly pronounced in the months of July, August and September. 
On 2 of the 3 fields the NOW trap counts for April and May were higher in 2009 than in 2008.

Why did this occur ?   Good question with no answers other than that is the way it was for 2009.

Following are the trap counts comparisons for 2008 and 2009 (the same fields and trap locations as 2008 and no sprays for NOW).

Field and Month Trap Counts per Trap
    2009     2008  
  Total # Moths/Trap Total # Moths/Trap
Figs Madera I
April 232 - 58.0 62 - 20.66
May 83 - 20.75 38 - 12.66
June 59 - 14.75 6 - 2.0
July 27 - 6.75 14 - 4.66
August 104 - 26.0 89 - 29.66
September 47 - 11.75 100 - 33.33
Total 552 - 23.0 309 - 17.16
             
Figs Madera II
April 51 - 12.75 43 - 21.5
May 125 - 31.25 25 - 12.5
June 80 - 20.0 6 - 3.0
July 57 - 14.25 95 - 23.75
August 253 - 63.25 613 - 153.25
September 98 - 24.5 474 - 118.5
Total 664 - 27.66 1,256 - 55.41

             
Pistachios Chowchilla
April 89 - 6.5 6 - 2.0
May 221 - 36.83 189 - 63.0
June 99 - 16.5 128 - 42.66
July 217 - 36.16 527 - 87.83
August 368 - 61.33 807 - 134.5
September 214 - 35.66 332 - 55.33
Total 1,208 - 32.16 1,989 - 64.22

Figs Madera I

Date Trap Counts # Male NOW Moths Caught
  #1
2009
#1-
2008
  #2
2009
#2
2008
  #3
2009
#3
2008
  #4
2009
                     
March 25 set set   set set   set set   set
March 31 1 0   4 0   1 0   0
                     
April 6 4 7   12 4   9 3   5
April 15 27 -   42 -   16 -   37
April 27 21 15   19 14   13 19   24
                     
May 4 2 -   2 -   0 -   3
May 11 10 3   20 7   3 1   12
May 20 9 9   12 16   4 2   6
                     
June 3-7 -   11 -   5 -   3  
June 10 1 1   1 2   1 2   1
June 17* 2 -   3 -   1 -   1
June 24 4 0   7 0   6 1   5
                     
July 3** 0 -   1 -   1 -   0
July 21 5 0   1 0   5 0   3
July 31 4 5   4 6   0 3   3
                     
August 7 3 4   3 7   0 36   -
August 18 17 3   10 13   8 26   56
August 25 7 -   2 -   1 -   5
                     
Sept 4 6 15   1 21   5 30   13
Sept 21 8 3   6 19   0 12   8
                     
Oct 3 - 17   - 47   - 16   -
Oct 17 - 8   - 14   - 4   -
*          New lures on June 17 in 2009
**        New lures July 11 in 2008


Figs Madera II

Date Trap Counts # Male NOW Moths Caught
  #1
2009
#1-
2008
  #2
2009
#2
2008
  #3
2009
#3
2008
  #4
2009
#4
2008
                       
March 25  set set   set set   set set   set set
March 31 1 -   0 0   0 -   1 2
                       
April 6  0 -   2 6   1 -   1 7
April 15 4   3   6   3
April 27 6 -   2 11   11 -   12 19
                       
May 4 5 -   2 -   0 -   7 -
May 11  18 -   11 1   25 -   20 13
May 20 11   12 3   5 -   9 8
                       
June 3 32 -   5 -   7 -   8-  
June 10 0 -   0 2   0 -   1 4
June 17* 3 -   2 -   3 -   2 -
June 24 9 -   6 0   0 -   2 0
                       
July 3 ** 2 -   10 2   0 -   1 1
July 21 6 29   10 27   9 0   2 36
July 31 4 -   6 -   5 -   4 -
                       
August 7 17 107   19 82   11 52   6 58
August 18 43 -   31 -   15 -   48 -
August 25 42 119   17 69   1 59   3 67
                       
Sept 4 29 94   28 57   5 89   13 86
Sept 10 7 41   3 20   5 26   8 61
                       
Oct 3 - 29   - 41   - 52   - 37
Oct 17- 18   -   3 -   15 -   19
                       
* New lures June 17 in 2009
** New lures July 11 in 2008 and started Tri-Lure on all trap sites
Before June 10 sites 1 and 3 had old single rubber septa lure.

Pistachios Chowchilla

Date Trap Counts # Male NOW Moths Caught
  #1
2009
#1-
2008
  #2
2009
#2
2008
  #3
2009
#3
2008
  #4
2009
#4
2008
                       
March 25   set set   set set   set set   set set
March 31 0 -   0 0   0 -   0 0
                       
April 6 0 -   1 0   0 -   0 0
April 15 0 -   0 -   1 -   0 -
April 27 4 -   4 3   9 -   5 1
                       
May 4 5 -   18 -   16 -   3 -
May 11 8 -   15 24   25 -   12 32
May 20 15 -   9 38   15 -   10 57
                       
June 3 14 -   5 -   11 -   11 -
June 10 1 -   3 36   2 -   0 45
June 17* 1 -   1 -   1 -   0 -
June 24 1 -   1 6   0 -   7 0
                       
July 3** 14 -   5 7   7 -   14 13
July 11 13 24   11 26   13 32   18 44
July 21 9 -   10 -   11 -   12 -
July 31 4 25   0 57   1 27   6 76
                       
August 7 0 -   9 -   2 -   2 -
August 18 34 49   22 44   23 103   19 49
August 25 18 47   24 49   16 84   14 87
                       
Sept 4 17 -   11 -   27 -   9 -
Sept 17 12 26   14 37   7 52   4 63
                       
Oct 8 - 22   - 31   - 37   - 36
Oct 27 - 0   - 0   - 0   - 2
                       
* New lures June 17
** New lures July 4. Before July 4 on sites 1, 3, 5 were old single septa lures. Tri-lures only on sites 2,4 and 6. After July 4 all sites had tri-lures.

Pistachios Chowchilla

Date Trap Counts # Male NOW Moths Caught
  #5
2009
#5
2008
#6
2009
#6
2008
         
March 25 set set set set
March 31 2 - 0 0
         
April 6 0 - 2 2
April 15 0 - 1 -
April 27 7 - 5 1
         
May 4 12 - 11 -
May 11 11 - 15 17
May 20 9 - 12 21
         
June 3 12 - 17 -
June 10 2 - 9 38
June 17* 0 - 0 -
June 24 0 - 0 3
         
July 3 ** 5 - 7 3
July 11 12 46 12 64
July 21 7 - 14 -
July 31 9 36 47

         
August 7 4 - 3 -
August 18 27 64 73 44
August 25 24 121 54 66
         
Sept 4 21 - 46 -
Sept 17 22 117 24  37
         
Oct 8 - 54 - 67
Oct 27 - - 0
         
* New lures June 17
** New lures July 4.  Before July 4 on sites 1, 3, 5 were old single septa lures.  Tri-lures only on sites 2,4 and 6.   After July 4 all sites had  tri-lures.

This proves the old adage that each year is different.