最好看免费中文,久久久久久亚洲精品不卡,2022国产成人精品视频人,性久久久久久久

 China |  English

Contact Us

Contact person:Mr. Xu

Tel:0539-8362712;

Mob:15588156707

QQ:258505678

E-mail:chengcheng279@vip.qq.com

Address: No. 8 Shunhe Road, Lanshan District, Linyi, Shandong province, P.R. China. 276000.

Website:www.estang.cn

After the flowers pest control

Publisher:Yu Guo PollenPublished:2013/10/29Hits:5242

After the flowers are all kinds of pest breeding, peak activity occurs large and concentrated, mainly pear scab, ring rot, pear psylla, pear stem bees pests and diseases. After falling one week snacks available thiophanate 1000 doubly peach heart 1500 times the net first prevention; available two weeks after combat scab based DuPont Fuxing 8000 times or homemade insecticidal doubly Diniconazole 2000 Star 2000 times liquid plus 1500 to 2000 times a second mite control.

Previous:Apple pollination method         Next:Pear pollination tips