PLANT PESTS AND DISEASES - ASSESSMENT OF CROP LOSSES

[1] CHESTER KS, 1950, PLANT DIS REP S, V193, P196

[2] CHIARAPPA L, 1970, FAO PLANT PROTECT B, V18, P29

[3] EDWARDS CA, 1964, PRINCIPLES AGRICULTU

[4] AGRICULTURAL PEST CONTROL AND ENVIRONMENT [J]. SCIENCE, 1970, 168 (3938) : 1419 - &

[5] IRVING GW, WHO458 TECH REP SER

[6] A SURVEY OF FOLIAR DISEASES OF SPRING BARLEY IN ENGLAND AND WALES IN 1967 [J]. ANNALS OF APPLIED BIOLOGY, 1969, 63 (02) : 253 - &

[7] NEUMEYER J, 1969, CHEM WEEK, V104, P38

[8] STERN VERNON M., 1959, HILGARDIA, V29, P81

[9] CONTROL OF APHIDS ATTACKING BARLEY AND ANALYSIS OF YIELD INCREASES IN IMPERIAL VALLEY CALIFORNIA [J]. JOURNAL OF ECONOMIC ENTOMOLOGY, 1967, 60 (02) : 485 - &

[10] 1969, REPORT SECRETARYS 1, P179

[1] CHESTER KS, 1950, PLANT DIS REP S, V193, P196

[2] CHIARAPPA L, 1970, FAO PLANT PROTECT B, V18, P29

[3] EDWARDS CA, 1964, PRINCIPLES AGRICULTU

[4] AGRICULTURAL PEST CONTROL AND ENVIRONMENT [J]. SCIENCE, 1970, 168 (3938) : 1419 - &

[5] IRVING GW, WHO458 TECH REP SER

[6] A SURVEY OF FOLIAR DISEASES OF SPRING BARLEY IN ENGLAND AND WALES IN 1967 [J]. ANNALS OF APPLIED BIOLOGY, 1969, 63 (02) : 253 - &

[7] NEUMEYER J, 1969, CHEM WEEK, V104, P38

[8] STERN VERNON M., 1959, HILGARDIA, V29, P81

[9] CONTROL OF APHIDS ATTACKING BARLEY AND ANALYSIS OF YIELD INCREASES IN IMPERIAL VALLEY CALIFORNIA [J]. JOURNAL OF ECONOMIC ENTOMOLOGY, 1967, 60 (02) : 485 - &

[10] 1969, REPORT SECRETARYS 1, P179