r*s
2 楼
it look like pear leaf spot
spraying the pear foliage with bordeaux mixture 4-5-50 or lime sulfur
solution 1-50 will satisfactorily control Myco-sphserella Leaf Spot. Three
applications are sufficient in the orchard; (1) just after the petals fall;
(2) two weeks later; (3) two weeks after the second application. In the
nursery it is recommended that two-year-old budded pears be sprayed shortly
after the new leaves open. Subsequent sprayings should be made at two-week
intervals; three sprayings i
spraying the pear foliage with bordeaux mixture 4-5-50 or lime sulfur
solution 1-50 will satisfactorily control Myco-sphserella Leaf Spot. Three
applications are sufficient in the orchard; (1) just after the petals fall;
(2) two weeks later; (3) two weeks after the second application. In the
nursery it is recommended that two-year-old budded pears be sprayed shortly
after the new leaves open. Subsequent sprayings should be made at two-week
intervals; three sprayings i
b*g
3 楼
谢谢你详细的回复, 我研究研究
;
shortly
a
this
【在 r******s 的大作中提到】
: it look like pear leaf spot
: spraying the pear foliage with bordeaux mixture 4-5-50 or lime sulfur
: solution 1-50 will satisfactorily control Myco-sphserella Leaf Spot. Three
: applications are sufficient in the orchard; (1) just after the petals fall;
: (2) two weeks later; (3) two weeks after the second application. In the
: nursery it is recommended that two-year-old budded pears be sprayed shortly
: after the new leaves open. Subsequent sprayings should be made at two-week
: intervals; three sprayings i
;
shortly
a
this
【在 r******s 的大作中提到】
: it look like pear leaf spot
: spraying the pear foliage with bordeaux mixture 4-5-50 or lime sulfur
: solution 1-50 will satisfactorily control Myco-sphserella Leaf Spot. Three
: applications are sufficient in the orchard; (1) just after the petals fall;
: (2) two weeks later; (3) two weeks after the second application. In the
: nursery it is recommended that two-year-old budded pears be sprayed shortly
: after the new leaves open. Subsequent sprayings should be made at two-week
: intervals; three sprayings i
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