REDUCED RISK CONCEPT FOR PROHEXADIONE-CALCIUM, A VEGETATIVE GROWTH CONTROL PLANT GROWTH REGULATOR IN APPLES

Victor W. Winkler
A US Environmental Protection Agency (EPA) voluntary program encourages the registration of pesticides which represent reduced risk to human health and the environment. A “reduced risk” designation for a pesticide depends on how its use will affect human health and the environment, pesticide resistance and pesticide management. Prohexadione-Ca - [CAS name: cyclohexanecarboxylic acid, 3,5-dioxo-4-(1-oxopropyl)-ion(1-) calcium, calcium salt] - is a bioregulator being developed by BASF Corporation and Kumiai Chemical Industry Company, Ltd. for controlling vegetative growth in apples with the effect of promoting fruit production. Prohexadione-Ca is a candidate for a “reduced risk” registration because there are reduced risk properties associated with its use. Prohexadione-Ca exhibits a very low mammalian toxicity and a low propensity for crop residues. Prohexadione-Ca rapidly dissipates in soil as a result of natural microbial metabolism and causes no detrimental ecological effects. There is no other hazard associated with the compound and no health risk for user or consumer is indicated. The use of prohexadione-Ca lessens host susceptibility to fire blight disease, which may retard the development of fire blight resistance to streptomycin. The use of prohexadione-Ca reduces tree row spray volumes of other pesticides up to 25%. With these beneficial characteristics, prohexadione-Ca will fit exceptionally well into an Integrated Pest Management (IPM) program, providing another “reduced risk” justification for the registration of prohexadione-Ca.
Winkler, Victor W. (1997). REDUCED RISK CONCEPT FOR PROHEXADIONE-CALCIUM, A VEGETATIVE GROWTH CONTROL PLANT GROWTH REGULATOR IN APPLES. Acta Hortic. 451, 667-672
DOI: 10.17660/ActaHortic.1997.451.79
https://doi.org/10.17660/ActaHortic.1997.451.79
fire blight, streptomycin, tree row volume, integrated pest management

Acta Horticulturae