ulated depending on the sensor temperature The c B4-KH14-B Bevel-helical gear Reduction Boxes B4

Flender/Flender Gear Units/Bevel-helical gear Reduction Boxes B4

urrounding the storage facilities extending up to 2 all around must be cleared of weeds and harborages. Despite precautions, rodents are likely to invade new or an uninfested storage structure when trapping or chemical control methods have to be undertaken. Repellents based on ultrasonic, electrical, chemical, and electromagnetic sources have not been partic- ularly effective under practical conditions (. Use of chemosterilant can form one ofthe components of integrated rodent management. reduction in population can bebrought out by using antifertility compounds that are specic for either sex in the formof bait formulations. Formulations based on -chlorohydrin, male sterilant and toxicant, are marketed in some countries (. In the natural environment, wild animals such as snakes, owls, hawks, ferrets, and mongooses check the rodent population. However, in grain storage facilities, the use of these predatory animals including dogs and cats posespractical problems. Predators can play signicant role in on-farm storage areas. Traps are useful where () there is low level of infestation in the premises, () accidental poisoning is likely to take place and the use of poisons is to be avoided, ()when rats are bait-shy, and () to avoid any dead-rat problem. Trapping is not an efcientmethod, as only adults and surplus populations are caught, whereas young ones and trap- shy rats are not affected. Various types of traps used with or without food baits are snap traps, steel traps, and wooden or metal box traps with single or multiple entry. Traps needregular inspection and setting and the trapped rats and dead rats need to be recoveredfrom the storages promptly. Chemical control methods involve fumigation and use of contact or stomach poi- sons. For rapid control, poisoning in suitable bait formulation is adopted. Precautions such as safe handling of the rodenticides, prompt disposal of poisoned rats, and removal and destruction of all uneaten baits at the end of the co