(2) _Examination for contamination._ Feed stored in a hot climate or in buildings where injurious grain insects are present is likely to become infested. Therefore feed should be visually examined bimonthly for presence of moths or adult insects. (_a_) Take the temperature of the feed by inserting a thermometer into the feed, especially in the bags at the center of the pile. If it exceeds 75° F. make a closer and more frequent examination. (_b_) A simple and practical test to discover the presence of insects is to place a quantity of the questionable feed in a sieve with 1/16-inch wire mesh (sieve PG-35), and shake over a white cloth or paper. Examine screenings and if insects are present, fumigate the feed according to instructions in (3) below to prevent further damage and ultimate ruin. (3) _Fumigation._ There are three methods for fumigating contaminated pigeon feed available to pigeon units. [Illustration: _Figure 11. Bath Pan PG-38._ TL70217] (_a_) Quartermaster, fumigation and bath companies (T/O & E 10-257) have facilities, such as portable methyl bromide fumigation chambers, for delousing clothing which may be used for fumigating pigeon feed. These units are generally assigned to posts, camps, or stations and to theaters of operations, and their services may be obtained. To use their equipment, load chamber with bags of contaminated feed, seal, and charge it with a 2-pound can of methyl bromide, Stock Number 51M892 (see Quartermaster supplement of the Federal Standard Stock Catalog). Feed should remain in the chamber for at least 24 hours. Temperature of the interior of the chamber should be maintained at a minimum of 70° F. (_b_) If a portable fumigation chamber is not available, a building which can be tightly sealed, like those used for training purposes in the Chemical Warfare Service, may be used. The feed should be loaded into the vault so that the entire floor space is utilized. Seal vault tightly and apply methyl bromide from the outside of the vault through a 1/4-inch diameter copper tubing at the top of the chamber. The connection between the tubing and the methyl bromide container should allow no leakage. The feed should remain in the vault for at least 24 hours. The temperature of the interior of the vault should be maintained at a minimum of 75° F. for best results. Use at least 1 pound of methyl bromide per 1,000 cubic feet of space. After the 24-hour exposure period, open vault and air it for a few hours before removing feed. Methyl bromide is toxic to human beings. Therefore, before opening or entering the vault after the exposure period, the fumigator should wear a gas mask type M9A1, with a standard service canister. [Illustration: _Figure 12. Catching pigeon in loft._ TL70181]