Rubber from late coagulated with sulphuric acid . Jour . Rubber Res . Inst . Malaya 5 ( 3 ) : 294 , 1934 46 . 47 . PAN American Union . Washington , D . C . Rubber : 3 , 1944 PETCH , T . The diseases and pests of the rubber tree : .

1978 PETCH , T. ( 1921 ) The South American leaf disease . In : The Diseases and Pests of the Rubber Tree . London : Macmillan . p . 78-81 . 1979 PETCH , T. ( 1928 ) Mycological notes - Fomes lignosus . Tropical Agriculture ( Trinidad ) ...

POTASH requirements of young rubber plants . Rubber Research Institute of ... STEINMANN , A. Diseases and pests of Hevea brasiliensis in the Netherlands Indies . ... TREE injection for the diagnosis of nutrient deficiencies . In Rubber ...

... for each individual tree , of yield , incidence of diseases and pests and other characters that are being studied . ... One of the open ends of a tube is covered with a piece of cheese cloth held in position with a rubber band .

He is one of a group of notable scientists who have conducted research on the control of the Sigatoga disease of bananas ... Hevea rubber tree , and is now assisting in the surveys and planning phases of the cacao farm mear Siquirres .

Invasive diseases of crop plants are also reviewed , concentrating on tropical tree crops , in particular : cocoa , coffee and rubber . Three fungal pathogens , Moniliophthora roreri ( cocoa frosty pod ) , Crinipellis perniciosa ...

Tree or agroforest level rejuvenation In agronomic trials with annual crops one may think that resources and prices ... what size of gaps and types of gap formation is gap planting feasible ( light , vertebrate pests , root diseases ) ?

82 ) not as a shade tree but as a supply for reforestation of denuded spots and for keeping lalang grass down . ... with hard , strong wood -- a rare combination ; ( 3 ) healthy constitution , not susceptible to diseases and pests ...

Introduction and spread of agricultural pests in Latin America : analysis and prospects 25 Studies on citrus canker in Japan ... Multiplication of the bacteria and histological changes of the host plant following rubber - block press or ...

Introduction and spread of agricultural pests in Latin America : analysis and prospects Studies on citrus canker in Japan ... Multiplication of the bacteria and histological changes of the host plant following rubber - block press or ...