A long procedure is needed to quarantine pinewood nematodes because only the dispersal third-stage larvae could be isolated and it cannot be identified directly before being cultured to adult nematodes. To shorten the...A long procedure is needed to quarantine pinewood nematodes because only the dispersal third-stage larvae could be isolated and it cannot be identified directly before being cultured to adult nematodes. To shorten the procedure, the effects of different temperatures and culture durations on the development of B. xylophilus larvae were studies with three fungus species as the culture media. The result showed that temperature had differential influence on development of the larvae in the three fungus media, and the influence was not significant. There was significantly different effect of the cold-stored fungi media on the larvae development. Fusarium sp. was the best, Pestalotia sp. was the second, Botrytis cinerea was the worst in promoting larvae development. Cold-stored B. cinerea was not suitable for the rapid quarantine of the nematode. When the L_Ⅲ larvae of B.xylophilus were abundant the quarantine could be accomplished in 48 h by culturing the L_Ⅲ larvae with cold-stored Fusarium sp. or Pestalotia sp. at 30展开更多
选用30%氯胺磷乳油、30%乙酰甲胺磷乳油和10%吡虫啉乳油3种高效农药,打孔注药防治杨树黄斑星天牛Anoplophora nobilis Ganglbauer,通过解析木抽样调查,对危害较轻的中幼林防治效果明显。试验表明,30%乙酰甲胺磷乳油1∶2浓度防治效果显著...选用30%氯胺磷乳油、30%乙酰甲胺磷乳油和10%吡虫啉乳油3种高效农药,打孔注药防治杨树黄斑星天牛Anoplophora nobilis Ganglbauer,通过解析木抽样调查,对危害较轻的中幼林防治效果明显。试验表明,30%乙酰甲胺磷乳油1∶2浓度防治效果显著,施药第30天死亡率为71.4%,防治效果达到65.5%;施药第40天死亡率为80%,防治效果达到78.7%。展开更多
开展了静电喷雾与非静电喷雾48%噻虫啉悬浮剂和2%噻虫啉微胶囊悬浮剂防治马尾松毛虫Dendrolimus punctatus(Walker)和蜀柏毒蛾Parocneria orienta Chao林间试验。试验结果表明:使用相同浓度药液,静电喷雾的防治效果明显优于非静电喷雾...开展了静电喷雾与非静电喷雾48%噻虫啉悬浮剂和2%噻虫啉微胶囊悬浮剂防治马尾松毛虫Dendrolimus punctatus(Walker)和蜀柏毒蛾Parocneria orienta Chao林间试验。试验结果表明:使用相同浓度药液,静电喷雾的防治效果明显优于非静电喷雾的防治效果,药液浓度越低,增效幅度越大;静电喷雾低浓度药液与非静电喷雾高浓度药液能获得同样防治效果,可节省农药30%以上;48%噻虫啉悬浮剂4 000倍液和2%噻虫啉微胶囊悬浮剂2 000倍液可作为静电喷雾防治马尾松毛虫3～4龄幼虫和蜀柏毒蛾4～5龄幼虫的适宜药液浓度。展开更多
文摘A long procedure is needed to quarantine pinewood nematodes because only the dispersal third-stage larvae could be isolated and it cannot be identified directly before being cultured to adult nematodes. To shorten the procedure, the effects of different temperatures and culture durations on the development of B. xylophilus larvae were studies with three fungus species as the culture media. The result showed that temperature had differential influence on development of the larvae in the three fungus media, and the influence was not significant. There was significantly different effect of the cold-stored fungi media on the larvae development. Fusarium sp. was the best, Pestalotia sp. was the second, Botrytis cinerea was the worst in promoting larvae development. Cold-stored B. cinerea was not suitable for the rapid quarantine of the nematode. When the L_Ⅲ larvae of B.xylophilus were abundant the quarantine could be accomplished in 48 h by culturing the L_Ⅲ larvae with cold-stored Fusarium sp. or Pestalotia sp. at 30
文摘选用30%氯胺磷乳油、30%乙酰甲胺磷乳油和10%吡虫啉乳油3种高效农药,打孔注药防治杨树黄斑星天牛Anoplophora nobilis Ganglbauer,通过解析木抽样调查,对危害较轻的中幼林防治效果明显。试验表明,30%乙酰甲胺磷乳油1∶2浓度防治效果显著,施药第30天死亡率为71.4%,防治效果达到65.5%;施药第40天死亡率为80%,防治效果达到78.7%。
