method. Incorporation of genetic
resistance into superior cultivars is
a second possibility for control. In-
cluded in the short-term goals to be
accomplished in this area of re-
search are:
A. Understanding the virulence
 and serology of various isolates
 of PD from around the state:
 including studies on toxin pro-
 duction, multiplication, and
 movement in the plant.
 B. Control of PD with antibiot-
 ics.
 C. Development of a procedure
 for screening grape seedlings
 for resistance. More informa-
 tion is needed on stage of
 growth for screening, inocu-
 lum concentration, and method
 of inoculation.
 D. Feasibility of controlling PD by
 limiting vectors and/or wild host
 plants. The difficulty of rear-
 ing leaf hoppers is a major ob-
 stacle in completing needed
 transmission studies.
 E. Determining whether or not a
 link exists between PD and
 young tree decline (Citrus
 blight).
 A third major long-range goal is
maximizing the efficiency of grape
production in Florida. In other
words, developing an integrated
crop management system for grapes
in Florida. Goals include:
A. Determining fertilizer and
 water requirements of the
 plant, and finding the best
 pruning and trellising systems


 for Florida grapes.
 B. Control of grape root borer
 through chemical or biologi-
 cal (genetic) mechanisms.
 C. Improved control of grape
 diseases and insects. Revising
 disease and insect control
 recommendations as new,
 more effective chemicals be-
 come available. More infor-
 mation is needed in timing of
 application and method (type
 of sprayer) of application.
 D. Improvement in grape fruit set
 and cluster size. Reducing the
 amount of dry calyptra in both
 bunch and muscadine grapes
 might be possible with plant
 growth regulators.
 E. Reduction in the amount of
 wet stem scar in mechanically
 harvested muscadine grapes.
 Ethrel and similar ethylene
 releasing materials have shown
 promise for this use.

 Vegetable Crops. Cultivar im-
provement is an ongoing, long-
range program to develop and/or
identify cucurbit cultivars superior
to those currently under cultiva-
tion in Florida. Short-term goals
in this area include:
A. Identify the breeding lines and
 recently-released cultivars that
 are superior to those currently
 recommended and grown in
 Florida. Seed companies are
 encouraged to release and
 name numbered lines that are
 superior in trials at Leesburg.
 B. Incorporation of high-type


 Fusarium wilt resistance into
 the commercial watermelon
 cultivars 'Charleston Gray'
 and 'Jubilee'.
 C. Release of an 'ice-box' melon,
 8-15 lb., with high quality,
 suitable for production in
 Florida and for shipping in
 cartons to domestic and over-
 seas markets.
 D. Development of a standard
 inoculum for use in green-
 house screening for Fusarium
 wilt resistance in waterme-
 lon.
 E. Release of F, muskmelons for
 which seed can be produced
 without emasculation and
 hand pollination. This in-
 volves the incorporation of the
 monoecious or male sterile
 flowering habit into a parent
 line.
 F. Development of bush type
 (short internode) watermelon
 and muskmelon plants to in-
 crease yield and efficiency of
 production.
 G. Development of F, hybrid
 watermelons, now feasible
 with the availability of di-
 verse germplasm with resist-
 ance to Fusarium wilt.
 Cucurbit disease and insect
control is a second long-range goal
in this area. Important cucurbit
diseases are Fusarium wilt (water-
melon), mildews (watermelon,
squash, muskmelon), watermelon
mosaic virus (all cucurbits), and
gummy-stem blight (watermelon,
muskmelon).


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