( This ( ( is ( in ( ( ( contrast ( to ( most ( other ( grape pathogens ) ) ) ) ) , ) ( such ( as ( ( ( black ( rot ( and ( downy mildew ) ) ) ) , ) ( that ( ( ( require ( free water ) ) ( on ( the ( plant surface ) ) ) ) ( before ( ( the spores ) ( can ( ( germinate and ) infect ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (PP (IN in) (NP (NP (NN contrast)) (PP (TO to) (NP (RBS most) (JJ other) (JJ grape) (NNS pathogens))) (, ,) (PP (JJ such) (IN as) (NP (NP (JJ black) (NN rot) (CC and) (NN downy) (NN mildew)) (, ,) (SBAR (WHNP (WDT that)) (S (VP (VBP require) (NP (JJ free) (NN water)) (PP (IN on) (NP (DT the) (NN plant) (NN surface))) (SBAR (IN before) (S (NP (DT the) (NNS spores)) (VP (MD can) (VP (VB germinate) (CC and) (VB infect))))))))))))) (. .)))
This is in contrast to most other grape pathogens, such as black rot and downy mildew, that require free water on the plant surface before the spores can germinate and infect.
(ROOT (S (NP (NNP Water)) (VP (MD can) (VP (VB be) (VP (VBN boiled) (S (VP (TO to) (VP (VB kill) (NP (NP (NN giardia)) (CC and) (NP (RBS most) (JJ other) (NNS pathogens))))))))) (. .)))