Word: propyl
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Dates: during 1960-1969
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Compounds that contain calcium arsenate, for example, may damage annual bluegrass; those containing dacthal and zytron can harm fescues and bent grasses. Two new chemicals, calcium propyl arsenate and diphenatrile, have yet to be fully proved in all conditions. And as good as they are, none of the killers are 100% effective. Besides, no chemical can control the fellow next door, whose grass crabbed because he didn't use Don't, and as a result the pest inches stealthily across the property line carrying the seeds (about 50,000 per plant) of a monstrous population explosion...
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