Table 1 Densities and performance variables of South American rice water weevil Oryzophagus oryzae on six rice cultivars in a 2-year field screening for antixenosis and antibiosis.

From: Morphoanatomical and biochemical factors associated with rice resistance to the South American rice water weevil, Oryzophagus oryzae (Coleoptera: Curculionidae)

Cultivar1

Variables2

Number of feeding scarsa

Number of eggsb

Number of larvaec

Weight of larvae (mg)d

TE50% (days)e

Weight of adult offspring (mg)f

ATAL

14.75 a

9.69 a

6.59 d

5.10 b

26.83 a

2.11 b

FIRM

14.58 a

8.03 a

4.67 e

4.58 c

26.83 a

2.07 b

LIGE

12.41 a

8.84 a

8.49 c

7.04 a

18.50 b

2.23 a

PAMP

12.66 a

8.82 a

14.11 a

7.34 a

18.50 b

2.29 a

QUER

13.25 a

8.06 a

9.95 b

7.29 a

16.83 b

2.25 a

DAWN

14.83 a

9.93 a

4.51 e

4.47 c

30.33 a

2.04 b

df

5

5

5

5

5

5

F

2.36

0.59

79.13

61.10

11.63

13.26

P

0.08

0.71

< 0.001

< 0.001

< 0.001

< 0.001

CV%

12.79

33.28

12.47

7.32

17.78

3.29

  1. 1Rice cultivars: ATAL = BRS Atalanta; FIRM = BRS Firmeza; LIGE = BRS Ligeirinho; PAMP = BRS Pampa CL; QUER = BRS Querência; DAWN = Dawn.
  2. 2Variables: a = number of feeding scars; b = number of eggs [both averages from 5, 8, and 11 days after flooding (DAF)]; c = number of larvae; d = weight of larvae (mg) (both averages from 15, 25, and 35 DAF); e = time (days) required to reach 50% adult population (TE50%); f = weight of offspring adults (mg) (average of male and female). Average values followed by the same letter does not differ significantly by the Scott Knott test (P < 0.05).
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