Effects of defoliation
on the growth and yield of okra
The effects on performance in the palms were investigated by manual defoliation
to simulate pest attack (Wood et al.
The presence of nectaries on leaves, flowers, and sugary secretions of damaged fruits by insects may explain the correlation between higher numbers of ants and reduction of defoliation
by beetles, caterpillars and leaf mining by Lepidoptera.
Three years of complete defoliation
is usually enough to kill a tree; evergreen, young, or weak trees may succumb in just 1 year.
Super Boll(R) brand ethephon is a single active ingredient plant growth regulator, used primarily to accelerate the opening of mature cotton bolls and to enhance defoliation
for earlier harvest in cotton.
Trees weakened by defoliation
are more susceptible to the ravages of disease organisms, other insects, and drought.
The danger will be if defoliation
causes additional stress,'' said Teresa Poscewicz, the zoo's horticulture manager.
A high level of specificity and significant defoliation
of tropical soda apple were demonstrated in host-specificity tests conducted at the Florida Biological Control Laboratory quarantine facilities in Gainesville, the USDA-ARS (Agriculture Research Service) South American Biological Control Laboratory in Argentina, and the USDAARS quarantine facilities in Stoneville, Mississippi, as well as in extensive field surveys and open-field tests conducted in South America.
The fungus may have finally dispatched it, but clearly, defoliation
by the caterpillar opened the way for other agents that otherwise probably would not have posed a serious threat.
The mean percent defoliation
of Chinese privet over all sites and years was 20.
In the course of defoliation
, countless veterans were exposed to the chemicals.
Where roots become exceedingly dense, as indicated by defoliation
in older potted ficus trees, root ball volume should be reduced by one-third and new soil added to fill the empty space.