50 NEW YORK STATE MUSEUM 
Wheat midge in rye fields 
Analysis of samples June 18, 1918 

SS 3350505050—°—0—=°"oO 



EAST SCHODACK NO. I EAST SCHODACK NO. 2 NORTH CHATHAM 
Per cent crop Per cent crop Per cent crop 
No. and No. and No. and 
percent }————————_| percent |—_——————__| per cent 
Loss | Class Loss | Class Loss | Class 
Large heads.... Pie Y| theca 12 TS i4| ease 21 PAW ||\neerey 14 
Spikelets. .... 81 Becta tl Wcralarocs| (Pests aclagball cedenealte AO Rita Olt t wae atc 
Grainsheeee 112 aan boot {pxsie sfahl Soiglsty |p Os LS omiaiart 
Grains, max. .|162 ate, Patel LOZ ee ery NO: Sebi cve Oats 
Maggots..... 29 Rael | Packet saa) aloo. |) Salsa, fh BO) Pree A ler ieace He 
Below max...| 31% 4 tery il2Oe Anil Werern|}i 2090 AN qahliiceeeae 
Medium heads. . 3 Silicate 20 ATAU taped 25 AW Weercaic 42 
Spikelets..... 68 Ssh na) Weckoucretl Wega Han Everetane | MOOI Ip atin iil ples a= feos | neeretoye 
Grains rae) ae'- 71 Pes Be Sake) ees eee iN ar7 A 
Grains, max. .|136 ee aan” |litist) ee PATS PITS ae Liem ONAN | tse oe | Deter eee 
Maggots.....| 45 __ dctiseod|lyseinesrn || AE hares Joon) | 2a. A EON ER Ola ae 
Below max...]| 48% OLN Sasol RH TOe2) |) tees ea TOMS wee 
Small heads..... AOwi | ates 24 AYA eae B23 liu! ATE A OUR 41 
Spikelets. .... 66 phone Bae ah ASO EM lee er OOM INE swat | Malrent CWS io 
Grainse ree 43 ee neler) Daihe eed MINES Gu NUA MITA AY Nyt leapt tepee re Minette 
Grains, max. .}132 Avetate Leh | LOO METS Wal Wiener ede | essed wy WY | MENT LIT MGA aoc Abt 
Maggots..... 55 siecle Si Si) || 220) shee ashanti PULARN RM Weld a) 
Below max...| 67% 31 aaa Wei 27 ae SN OIG) BOW iy ua ese 
White heads.... 82 | 43 A3 2 2 2 2 2 2 
Spikelets..... BD re oil ected SPL tone le ce LT hoses (teres Fee aoa In Relea men ean NIV ae tA enero Ane OOS Ro ea Lette tae 
(Grains) ele: 
Taabook:11 455 qc | paLOy Gian wath MN) WU eal MHA TG at lL Unde ll eo ulti orate cel chil ioimidl sy hime aioles b 
Maggots..... the a Da me nN (teen event VaR [al Vay VES MRO NY Wren eae aM cara Pie ict ee toa MOAI IHU eevee || fo aid fosc 
Totaland percent TOON |S 7 OM Ween I ASP alain 99 | 34.5 | .--.- 


East Schodack field no. 1 was very badly infested, no. 2 showed 
only a moderate infestation and the North Chatham field still less. 
The last was considered one of the best looking pieces of rye in that 
section. 
Attention is cailed first of all to the varying percentage of large, 
medium, small and white heads in these three fields. ‘The percentage 
of the last was low except in the Schodack field no. 1, while the marked 
difference between the Schodack field no. 2 and the North Chatham 
field is in the percentage of small heads. 
The maximum grains possible are double the number of spikelets 
and the reduction from the maximum in each case is calculated by 
taking the difference between the maximum grains and the actual 
number and figuring out the percentage for the group and then the 
percentage reduction for the entire crop, this latter appearing by 
itself in the column marked Crop percentage, loss. It should be 
remembered that a maximum yield is very rarely obtained and that 
