Table 8a.--Prediction of late hatching of Melanoplus sanguinipes as to dates 
when 0 to 100 percent will have hatched 
Current 
i Effect of 
Average average 
5-day maximum maximum ( 1-degree 
interval temperature | temperature 
; = 5 5 
March 2-6---4 26.0 | | 
jeuie-4 | 33.4 | | 
12-16---4 41.3 - .034 
17-21---4 47.8 | 079 
22-26---- 50h 134 
ZU, Stal | .140 | 
April 1-5---4 47.9 106 | 
6-10---- 50.5 041 
Tess =" 53.9 - .044 | 
16-20--- 61.9 - .142 
21-25--- 59.8 - .242 
26-30----4 67.0 | = 335 | 
May 1-5---4 67.3 = 412 
6al0=--4 62.3 - 463 | 
11-15----| 65.7 - .480 | 
16-20---- 70.8 Sao 2at | 
21-25----' 70.7 = ao7t | 
26-30----| 67.3 SP 
31-4----, 70.9 | = 08s || 
June 5-9---- 29 | 
1/ Results of column 6, sum of a(t-t), added to or subtracted from 
dates in table 8b when O to 100 percent will have hatched. 
Table 8b.--Average and predicted hatching dates for Melanoplus sanguinipes 
late hatchin when O to 100 percent will have hatched 
Hatch (percent eos eee Averaccudate 0 ar Predicted date 
0 ------------- May 26 ----------- 
MO) St June 7 <<--------- 
20 ------------- June 12 ---------- 
30 ------------- June 14 ---------- 
40 ------------- June 16 ---------- 
90 W-9---------- June 18 ---------- 
60 <------------- June 20 ---------- 
10 ------------- June 22 ----------- 
80 ------------- ‘ June 24 ---------- 
90 ------------- June 26 ---------- 
100 ------------- July 5 ----------- 
