給甜瓜套袋,目的有二:一(yi)是(shi)防(fang)病(bing),二(er)是(shi)避(bi)免(mian)在(zai)噴(pen)藥(yao)時(shi),將(jiang)藥(yao)劑(ji)噴(pen)到(dao)正(zheng)在(zai)膨(peng)大(da)的(de)甜(tian)瓜(gua)果(guo)皮(pi)表(biao)麵(mian),導(dao)致(zhi)果(guo)實(shi)的(de)表(biao)麵(mian)因(yin)藥(yao)劑(ji)刺(ci)激(ji)出(chu)現(xian)黃(huang)色(se)斑(ban)點(dian),影(ying)響(xiang)果(guo)實(shi)的(de)商(shang)品(pin)性(xing)。但(dan)是(shi)記(ji)者(zhe)在(zai)壽(shou)光(guang)市(shi)紀(ji)台(tai)鎮(zhen)采(cai)訪(fang)時(shi),卻(que)看(kan)到(dao)不(bu)少(shao)瓜(gua)農(nong)棚(peng)內(nei)種(zhong)植(zhi)的(de)甜(tian)瓜(gua)已(yi)經(jing)長(chang)到(dao)鵝(e)蛋(dan)大(da)小(xiao),應(ying)該(gai)套(tao)袋(dai)了(le),而(er)有(you)些(xie)菜(cai)農(nong)卻(que)不(bu)打(da)算(suan)再(zai)給(gei)甜(tian)瓜(gua)套(tao)袋(dai),原(yuan)因(yin)是(shi)發(fa)現(xian)套(tao)袋(dai)後(hou)的(de)甜(tian)瓜(gua)還(hai)是(shi)有(you)不(bu)少(shao)果(guo)實(shi)感(gan)染(ran)細(xi)菌(jun)性(xing)病(bing)害(hai),以(yi)致(zhi)果(guo)麵(mian)上(shang)出(chu)現(xian)大(da)量(liang)的(de)黃(huang)褐(he)色(se)斑(ban)點(dian)。那(na)麼(me)菜(cai)農(nong)在(zai)給(gei)甜(tian)瓜(gua)套(tao)袋(dai)時(shi),需(xu)要(yao)注(zhu)意(yi)哪(na)些(xie)問(wen)題(ti)呢(ne)?
首(shou)先(xian),在(zai)果(guo)實(shi)長(chang)到(dao)鵝(e)蛋(dan)大(da)之(zhi)前(qian),果(guo)實(shi)表(biao)麵(mian)的(de)絨(rong)毛(mao)密(mi)集(ji)時(shi),這(zhe)層(ceng)絨(rong)毛(mao)會(hui)對(dui)果(guo)實(shi)形(xing)成(cheng)保(bao)護(hu),藥(yao)液(ye)不(bu)會(hui)被(bei)噴(pen)到(dao)果(guo)皮(pi)表(biao)麵(mian),這(zhe)時(shi)要(yao)抓(zhua)緊(jin)噴(pen)施(shi)一(yi)次(ci)百(bai)菌(jun)清(qing)等(deng)廣(guang)譜(pu)性(xing)的(de)殺(sha)菌(jun)劑(ji)防(fang)病(bing),然(ran)後(hou)等(deng)藥(yao)劑(ji)幹(gan)燥(zao)後(hou),或(huo)者(zhe)第(di)二(er)天(tian)上(shang)午(wu)7-10點及下午3-6點dian,棚peng內nei空kong氣qi濕shi度du較jiao小xiao時shi進jin行xing套tao袋dai即ji可ke,千qian萬wan不bu可ke在zai藥yao劑ji幹gan燥zao前qian或huo者zhe棚peng內nei空kong氣qi濕shi度du大da時shi套tao袋dai,以yi防fang袋dai內nei濕shi度du過guo高gao,套tao袋dai後hou果guo實shi表biao麵mian依yi然ran細xi菌jun性xing病bing害hai發fa生sheng嚴yan重zhong。
qici,zaitaodaihou,jiangdaidedibusikaiyigexiaokou,zheyangbianyujiangguoshijinxingzhengtengzuoyongsanshideshuifenpaichudainei,tongshiyenengyouxiaoyufangdaineiwenduguogao,yufangtianguaganranbinghai。yinweidaidibukaikoujiaoxiao,cainongzaitaodaihoupenyaoshi,yaoyeburongyicongdaididepokouchujinrudaineizhandaotianguaguomianshang,yingxiangguoshideshangpinxing。
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