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highflywind鐵蟲 (小有名氣)
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[求助]
綜合防效是怎么回事?
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以前看文章都是防效和校正防效,今天突然看見了綜合防效,不知道哪位達(dá)人知道怎么計(jì)算啊,小弟拜謝了 |
鐵蟲 (小有名氣)
鐵蟲 (小有名氣)
金蟲 (著名寫手)
讓我想想
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我是外行,是不是按防治效果來說的呢?90%上,表示為抑制率。僅僅是猜測,還希望能找到文獻(xiàn)進(jìn)行正確解讀。在網(wǎng)上找了些,不知有幫助沒? Using 1501.1g of acetochlor 20 WP + 24.0g ofchorsulfuron 25 WP or 1126.0g of acetochlor 20WP+30.0gof chlorsulfuron 25WP,90%of monocotvledonous of dicotyle-donous weed can be controlled and a significant increase ofwheat production can be obtained. 乙草胺與綠黃隆混配,可一次性防除稻麥水旱輪作區(qū)麥田單、雙子葉雜草。試驗(yàn)結(jié)果表明:每畝以20%乙草胺100克與25%綠黃。保犊思埃玻希ヒ也莅罚罚悼伺c25%綠黃。部嘶煊,除草保產(chǎn)效果明顯,對(duì)單、雙子葉雜草綜合防效可達(dá)90%左右。 文摘來源 The results of field and laboratory tests indicated that both of Mianlingbao 50EC(phoxim+parathion-methyl)and Mielinghuang 26EC(phoxim+cyhalothrin)had good control effect against larvae of cotton bollwerm (Heliothis armigera Hubner).5 Days after spraying with the diluent of 1∶100,the control effects against 2~3 instars larvae were 96.7% and 93.3%,respectively.Mianlingbao 50 EC is a good overcide,too.7 Days after treatment at 75 ml/667m 2 the control effect reached to 94.4%.The other 2 insectcides,BETA-cy... 田間試驗(yàn)和室內(nèi)試驗(yàn)表明,50%棉鈴寶乳油對(duì)棉鈴蟲幼蟲和卵,26%滅鈴皇乳油對(duì)棉鈴蟲幼蟲均具有理想的防治作用。噴施棉鈴寶75毫升/667米2后7天,蟲卵綜合防效達(dá)944%,噴施棉鈴寶100倍液和滅鈴皇100倍液后5天,對(duì)2~4齡幼蟲的防治效果分別達(dá)967%和933%。氟氯氰菊酯與三唑磷對(duì)3齡以上幼蟲防效不理想 文摘來源 In 1990~1995,field trials and demonstrations with metsulfuron-methyl to control weeds in rice stubble wheat field were carried out.The results of experiment showed that 10% metsulfuron-methyl WP at dosage of 2 5~10g/667m 2,optimum dosage of 5~7 5g/667m 2,at bud stage as well as 3-leaf stage of wheat had significant effect of controlling weeds.At dosage of 5g/667m 2,the control effects are 93 1% for Alopecurus aequalis, 97 6% for Stellaria media,79 6~95 9%for Veronica diclyma,Desavrainia sophia... 本文報(bào)道了1990~1995年甲磺隆防除稻茬麥田雜草的試驗(yàn)研究和推廣應(yīng)用結(jié)果。試驗(yàn)表明在小麥播后苗前和三葉一心期,667平方米用甲磺。勃保怠保翱,對(duì)多種雜草均有明顯防效,其最適用量為5~75克/667米2。用甲磺。悼耍叮叮访祝玻瑢(duì)看麥娘、牛繁縷防效達(dá)931和976%,對(duì)婆婆納、播娘蒿、蓼、夏至草、大巢菜等防效為796~959%。其綜合防效優(yōu)于口惡唑禾草靈、綠磺隆、芐嘧磺隆和綠麥;小麥播種至返青拔節(jié)期使用甲磺隆,藥效隨施藥時(shí)期推遲而降低,以播后苗前至三葉一心期除草效果最好;1993~1995年累計(jì)推廣應(yīng)用436萬公頃,除草和增產(chǎn)效果顯著 |

鐵蟲 (小有名氣)
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