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Table 7 Influence of season on the population pressure (%) of Zonocerus variegatus on annual and perennial crops in the humidforest zones of Southern Cameroon.

From: Farmers' perception on the importance of variegated grasshopper (Zonocerus variegatus (L.)) in the agricultural production systems of the humid forest zone of Southern Cameroon

Crops AECD-Blocks Long dry season Short rainy season Short dry season Long rainy season p-value
Annual Crop Yaoundé 72 4 16 9 <0.0001
  Mbalmayo 70 7 11 13 <0.0001
  Ebolowa 64 10 27 0 <0.0001
     p-value NS NS NS NS  
     Means 69 7 18 7 <0.0001
Young Perennial Crops Yaoundé 25 3 12 1 <0.05
  Mbalmayo 36 5 10 10 <0.05
  Ebolowa 63 9 29 0 <0.0001
     p-value <0.05 NS <0.05 NS  
     Means 41 5 17 4 <0.0001
Female
Annual Crop Yaoundé 76 1 13 10 0.0054
  Mbalmayo 68 5 12 15 0.0071
  Ebolowa 67 9 24 0 0.0015
     p-value NS NS NS NS  
     Means 69 5 16 8 <0.0001
Young Perennial Crops Yaoundé 15 0 5 0 NS
  Mbalmayo 31 6 13 10 NS
  Ebolowa 69 4 27 0 0.0017
     p-value NS NS NS NS  
     Means 38 3 15 3 0.0014
Male
Annual Crop Yaoundé 68 6 19 7 0.0061
  Mbalmayo 72 9 9 10 0.0080
  Ebolowa 61 10 29 0 0.0015
     p-value NS NS NS NS  
     Means 67 8 19 6 <0.0001
Young Perennial Crops Yaoundé 34 6 18 2 NS
  Mbalmayo 40 3 7 9 NS
  Ebolowa 57 13 30 0 0.0017
     p-value NS NS NS NS  
     Means 44 7 18 4 0.0002
  1. The values are averages of the scores for 10 groups of farmers (5 male and 5 female groups) interviewed per AECD-Blocks; p-value is the significance levels of a non parametric test of Kruskal-Wallis; NS = nonsignificant (p > 0.05); AECD-Blocks = Agro-Ecological, Cultural and Demographic Blocks.