10.5 SCIENTIFIC REPORTS OF THE AGRICULTURAL RESEARCH 



in every case gave satisfactory results. Two grades were 

 tested, of which that known as No. 2 gave much better 

 results than did No. 1. Resin Compound, Fishoil-Resin 

 Soap, and Incosopol No. 2 seem all about equally effective 

 insecticides against Aphids, Aleyrodids, Scale-insects and 

 Mealy-bugs, which are common garden pests ; Fishoil-Resin 

 Soap and Incosopol No. 2 can be safely recommended as 

 they cause no injury even to tender foliage. 



Against the common house Cockroach (Periplaneta 

 americana) infesting a godown trials were made of a 

 mixture of Boracic Acid in honey. In an experiment in 

 the Insectary adults as well as nymphs fed greedily on this 

 mixture; after the second day they began to pass k liquid 

 excreta and the nymphs died off in the course of five days ; 

 the adults, however, resisted longer, not dying even on the 

 eighth day, but by that time they were certainly very sick, 

 unable to walk and lying on their backs. Boracic Acid, 

 though effective, is therefore a very slow poison to these 

 insects. In a house they may be trapped in numbers in 

 an open-mouthed kerosine tin in which is placed a quantity 

 of weak solution of gur (molasses) in water ; the adults are 

 attracted and drop into the gur solution and appear unable 

 to escape. 



Protection of wood against Termites. Simple 

 experiments in the protection of wood against Termites 

 (so-called " White Ants ") have been in progress since 1910, 

 the termite utilized being Microtermes obesi. The name 

 of the species concerned is given here because different 

 species of termites have different habits and tastes, facts 

 which are usually overlooked in carrying out similar experi- 

 ments. Some kinds of timber may be more or less immune 

 to attack by the local termites in one district, yet the same 

 kinds of timber may be greedily attacked by other species 

 of termites in another district. Our experiments have 

 shown also that any particular method of treatment does 

 not produce the same deterrent effect in all varieties of 

 wood. The deterrent effect depends on (1) the treatment 

 Employed, (2) the variety of wood treated, and (3) the kind 



