ut development.

It was soon found that the pecan spittle bug was putting in its
appearance earlier according to the calendar than in 1951 so an effort
was made during the season to correlate insect life history and nut
development during the season. Table 4 give some of the principal points
in both.

Table 4. Pecan Spittle Bug and Nut Development Anna, Illinois, 1952

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Insect Date Tree
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Egg stage Apr. 24 Catkins 1/2 to 3/4 inch
First nymphs May 5 Catkins 1 to 1-1/2 inch
Many nymphs and spittle May 12 Catkins 2 to 3 inches
Fruit buds
Peak hatch May 20 Female flowers
Spittle drying June 2 Nuts developing
1st. 2nd brood June 27
Hatch mostly over July 7
Spittle drying July 26
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Another phase of life history which is of practical importance is the
increase of second brood over first. Records were made both at Anna and
at Eldred in unsprayed blocks at approximately the peaks of occurrence
of nymphs and spittle, and are tabulated in Table 5.

Table 5. Pecan Spittle Bug Infestation, first and second broods, 1952
Number of spittle masses per 100 terminals

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First brood, June Second brood, July
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Anna 41 62
Eldred 23 50
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This table shows an increase of approximately 50% at Anna and 100% at
Eldred. It is thought that a 3 inch flash flood which occurred at Anna
might have reduced the first brood infestation somewhat after the counts
were made and been responsible for no greater increase and possibly that
the heat and drought in both places might have resulted in a reduction.
Be that as it may the total infestation was not as severe in 1952 as in
1951.

4. Control.

_First Brood Sprays_

It was originally planned to spray in both places but at Anna the owner
sprayed all but the 1951 check block with parathion early and the
infestation was reduced to