Skip to main content

Table 7 Expected frequencies of annual generations of Tuta absoluta Merssa-Matrouh governorate during 2012

From: Prediction of annual generations of the tomato leaf miner Tuta absoluta on tomato cultivations in Egypt

Month

Days (n)

t − x

n (t − x)

Rate of generation development

Expected date of annual generations

Cycles no.

February 2012

29

7.64

221.6

0.28

1, Feb. 2012

 

March

31

9.67

299.8

0.38

 

April

19.864

13.89

277.7

0.35

 Total

79.86

 

799.1

1

19.86, Apr. 2012

1

April

10.14

13.89

141.76

0.18

  

May

31

16.2

502.2

0.63

June

8.226

18.86

155.14

0.19

 Total

49.37

 

799.1

1

8.23, Jun. 2012

2

June

21.77

18.86

410.58

0.51

  

July

17.88

21.73

388.52

0.49

 Total

39.65

 

799.1

1

17.88, Jul. 2012

3

July

13.12

21.73

285.1

0.4

  

August

23.226

22.13

514

0.64

 Total

36.346

 

799.1

1

23.23, Aug. 2012

4

August

7.77

22.13

171.95

0.22

  

September

30

20.28

608.4

0.76

October

1.016

18.46

18.75

0.02

 Total

38.79

 

799.1

1

1.02, Oct. 2012

5

October

29.98

18.46

553.43

0.69

  

November

16.09

15.27

245.67

0.31

 Total

46.07

 

799.1

1

16.09, Nov.2012

6

November

13.91

15.27

212.41

0.27

  

December

31

10.55

327.05

0.41

January 2013

30.98

8.38

259.64

0.32

 Total

75.89

 

799.1

1

30.98, Jan.2013

7

January 2013

0.02

8.38

0.17

0

  

Total no. of cycles

7