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臺灣農藥科學 第
1
期
76
圖一、抗及感性繖花龍吐珠對嘉磷塞之劑量反應。繖花龍吐珠採集於臺中市，於溫室栽
種至
12 ~ 15
葉齡噴施嘉磷塞藥劑，
(A)
施藥後
14
日採收植株，以乾重為指標利用
log-logistic
公式估算
ED
50
值，抗及感性繖花龍吐珠分別為
0.41
及
5.04 kg a.e./ha
。
(B)
抗及感性繖花龍吐珠施藥後
14
日之傷害徵狀。
Fig. 1.
Dose response of
Hedyotis corymbosa
seedlings against glyposate.
H. corymbosa
from
Taichung was raised in a greenhouse and foliar treated with glyphosate at the 12 ~ 15 leaf
stage. (A) Dry matter weight was determinedat 14 days after treatment, and the log-logistic
equation was used for curve fitting. The estimated ED
50
values for glyphosate-susceptible (S)
and glyphosate-resistant (R) were 0.46 and 4.58 kg a.e./ha, respectively. (B)
H. corymbosa
seedlings 14 days after treatment.