The virus causes considerable reduction in yield of affected cacao trees ( 4 ) . The disease at present is confined . to the western part of the Northern Range . The virus vector is mealybugs of which five species have been recorded ...

PIRONE P.P. A bark canker disease of London plane , redhud ; and sweet rum . ( abstract ) Phytopathology 2 ( 1 ) : 16. 1952 . 32 . ... RANKIN , W. H. Manual of tree diseases . Macmillan 1918. 398.p. 37 . 31. RIBALDI , M. Su un caso raro ...

cultured from " Stubborn " disease of citrus . ... Ed . por Buchanan , R.E .; Gibbons , N.E. Bergey's manual of determinative bacteriology . ... Ed . por Maramoroch , K .; Raychaudhuri , S.P. Mycoplasma diseases of tree and shrubs .

The type of soil where the citrus tree will definitely be planted , is the most important factor taken into ... of the scion to these and other problems , water - logging , high wind intensity , temperature , etc. are also considered .

Hence flightless aphids are not significant in CTV spread unless tree canopies touch . ... results in high inoculum and vector pressure , therefore , CTV problems in the vicinity of a Temple grove can be chronic .

Kg./12:12:17:2 per year for each year of growth of the tree . This is split into four ( applications ) . Foliar spray is also sprayed when applying insecticide / fungicide . Weed control has been mainly manual but lately the herbicide ...

Instructions ( Classroom ) MOT 6. Analysis ( 2 hours ) and Presentation ( 2 hours ) a ) Each group will receive a file of supplementary data on ' their ' farm . b ) Shade tree dimensions and locations should be used to prepare semi ...

... growing cherry growing guava fruit - tree growing fruit growing control of pests / diseases orchard care backyard ... to needs To document information on R & D for last decade To prepare a manual for local conditions Development of ...

L. C. González Introduction to the diagnosis of plant disease . ... G. Guerra Manual de enseñanza práctica de produc- ción de hortalizas . ... R. Villareal Traditional and potential fruit tree crop development .

Land preparation for planting of fruit trees in St. Vincent is limited to manual clearing of virgin or secondary forest and ... make trees grow slender and tall as well as making them more susceptible to attack by pests and diseases .