付甫永 司徒春南 展茂魁
摘 要:2年1代跨3個(gè)年頭生活史的云斑天牛選擇在6月上旬至10月上旬進(jìn)行釋放。一天中最佳的釋放時(shí)間是在晴天17:00—20:00時(shí)進(jìn)行。調(diào)查時(shí)每hm2有被害株1~3株的,按每hm2750~1 500頭花絨寄甲成蟲釋放;每hm2被害株在1株以下的,按每hm2450~750頭花絨寄甲釋放;作為預(yù)防性的核桃林,按每hm2300頭花絨寄甲釋放。要做到花絨寄甲釋放路線合理,在林中釋放的花絨寄甲成蟲分布基本均勻。
關(guān)鍵詞:釋放技術(shù);花絨寄甲;云斑天牛;寄生
中圖分類號(hào) S436.64 文獻(xiàn)標(biāo)識(shí)碼 A 文章編號(hào) 1007-7731(2016)14-0085-02
Abstract:Dastarcus helophoroides would be released in early June to early October to control Batocera horsfieldi one generation two years across the three year life history. And the best release time was from 5pm to 8pm in sunny days. 750~1500 D. helophoroides adults were released to 1 hectares of forest that there was 1~3 affected trees. 450~750 D. helophoroides adults were released to 1 hectares of forest that there was 1 affected trees or no affected trees. 300 D. helophoroides adults were released to 1 hectares of forest for the prevention. It will be a reasonable release route for the uniform distribution of D. helophoroides in the forest.
Key words:Release technology;Dastarcus helophoroides;Batocera horsfieldi;Parasitic
花絨寄甲Dastarcus helophoroides Fairmaire又稱花絨穴甲,花絨堅(jiān)甲,是松褐天牛、光肩星天牛、星天牛、栗山天牛、等個(gè)體較大天牛幼蟲的重要寄生性天敵[1,2]。對(duì)抑制這些大型的天牛有著重要的作用,釋放花絨絨甲對(duì)天牛的試驗(yàn)結(jié)果[3-8]表明:利用寄生性天敵昆蟲花絨寄甲是防治危害經(jīng)濟(jì)林如核桃、豐產(chǎn)用材林如楊樹的云斑天牛的一種良好的新技術(shù),值得在生產(chǎn)防治中大力推廣應(yīng)用[9]。但相關(guān)釋放技術(shù)卻少有報(bào)道。為此,特將生產(chǎn)應(yīng)用中野外釋放花絨寄甲防治核桃云斑天牛的技術(shù)總結(jié)供參考。
1 釋放前準(zhǔn)備
主要是物質(zhì)準(zhǔn)備,包括花絨寄甲成蟲,運(yùn)輸交通工具、遮陽(yáng)工具,釋放地的蟲口密度調(diào)查,核桃林分釋放量的調(diào)查,釋放人員的安排及培訓(xùn)等。
2 釋放時(shí)間
由于花絨寄甲主要寄生云斑天牛3齡以下的幼蟲及蛹,因此,要根據(jù)花絨寄甲這一寄生特點(diǎn),選擇在云斑天牛3齡以下的幼蟲期和蛹期進(jìn)行。2年1代跨3個(gè)年頭生活史的云斑天??梢赃x擇在6月上旬至10月上旬進(jìn)行釋放?!?br>