[A]
[B] [C] [D]
[E] [F] [G]
[H] [I-J-K] [L]
[M-N] [O-P] [Q-R]
[S] [T] [U-V]
[W-X-Y-Z]
decomposition See degradation.
degradate Chemical product resulting from
degradation of a pesticide.
degradation Process by which
a pesticide is broken down to simpler structures through biological
or abiotic mechanisms. Synonyms include
breakdown and decomposition.
See also biodegradation, mineralisation.
(OECD)
desorption Depletion of one or more
components in an interfacial layer. (Gold, 1993)
detoxification Processes of chemical
modification which make a pesticide less toxic. (after Duffus, 1993)
diluent Liquid or solid material used to dilute
a concentrated pesticide formulation prior to application. Most commonly water
for spray application.
dislodgeable residue Portion of a pesticide
residue on treated vegetation that is readily removable and may be used as
an index for risk to farm workers. Generally measured by the residue removed
when leaf discs are shaken briefly in water.
dissipation Loss of pesticide residues
from an environmental compartment due to degradation and transfer to another
environmental compartment.
dissipation time 50% (DT50)
Time required for one-half the initial quantity or concentration
of a pesticide to dissipate from a system. No assumption as to the rate
equation is made. See also half-life.
dispersible granule See water-dispersible
granule.
dose-effect relationship Graded
relationship between the dose of the pesticide to which the organism
is exposed and the magnitude of a defined biological effect, either
in an individual organism or in a population. See also concentration-effect
relationship. (after Duffus, 1993)
dose-response relationship Association
between dose and the incidence of a defined biological effect in an exposed
population. (after Duffus, 1993)
drift control agent Formulant
that control the distribution of spray droplet sizes and prevents production
of excessive fines.
dry weight basis Pesticide residue
concentration reported as if the residue were wholly contained in the
dry matter of the sample, i.e. analytical results are corrected for
the water content of the test sample.
Residues in soils and feeds, and maximum
residue limits (MRLs) for feedstuffs are expressed on a dry weight
basis.
dustable powder (DP) Free flowing powder suitable
for dusting. (GIFAP, 1995)
> Synopsis
> Preface
> References
