Distribution and Severity of Alfalfa Pests 



Insects and nematodes 



I 1 Not known to occur 



I 1 Occurs but is not an important problem 



1 i Occasionally causes signficant losses on 

 susceptible cultivars 



I I Frequently causes significant losses on 

 susceptible cultivars 



Figure 20. — Alfalfa weevil, Hypera postica (Gyllenhal). 



Figure 21 . — Egyptian alfalfa weevil, Hypera brunneipennis 

 Boheman. 



Figure 22. — Meadow spittlebug, Philaenus spumarius 

 (Linnaeus). 



Figure 23. — Pea aphid, Acyrthosiphon pisum (Harris). 



Figure 24. — Blue alfalfa aphid, Acyrthosiphon kondoi Shinji. 



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