Pesticide prevention and control technology for mountain long melon

The mountain long melon has entered the early stage of harvesting. Due to the high amount of rain in the previous period and the high temperature, the occurrence of pests and diseases is more serious. If it cannot prevent and control the yield and quality in time, it may cause large losses. According to field research, the main diseases of long melons are powdery mildew, blight, anthracnose and viral diseases. The main pests are aphids, melons, and Spodoptera litura. Farmers can choose different pesticides according to different diseases and pests in time for prevention and control.

1. Pest
1 绢螟 绢螟, 斜 夜 等 等 等 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2500-3000 times spray control.
2 Aphids can be sprayed with 10% imidacloprid 3000 times or 50% anti-Pu Wei WP 5000 times liquid spray.
2. Disease
1 Bacterial wilt can be brushed with high concentration of metalaxyl in the stem and combined with foliar spray. Spray with 25% metalaxyl WP 750-1000 times, 50% chlorhexidine WP 1000 times, 70% thiophanate-methyl WP 600 times, 75% chlorothalonil WP 600 times spray control .
2 Powdery mildew can be controlled by 15% triazolone wettable powder 1000 times solution or 40% myclobutanil 1500-2000 times, 10% high water dispersible granules 1500 times, 40% Fuxing emulsifiable concentrate 4000 times liquid. Control every 7 days, even 2 to 3 times, pesticide rotation.
3 virus disease can be treated with 20% virus A wettable powder 500 times, 2% viral spirit 1000 times, 1.5% plant disease 1000 times, every 7-10 days, even prevention 2-3 times, and pay attention to prevent aphids .
4 anthracnose can be treated with 80% WP 1500-800 times or 50% thiophanate 500 times, and charcoal 600-800 times.

Lap Joint Flanges

Lap Joint Flanges (LJ Flanges) are used on piping fitted with lapped pipe or with lap joint stub ends the combined initial cost of the two items being approximately one-third higher than that of comparable Welding Neck Flanges.

Lap joint flange is having two components, a stub end, and a loose backing flange. Stub end is butt welded to the pipe and Backing flange freely move over the pipe. The backing flange can be of different material than stub material and normally of the carbon steel to save the cost. Lap flange is used where frequent dismantling is required, and space is constrained.

Furthermore, a standard lap joint flange will typically have a longer hub length in comparison to a slip on flange, but this is often considered unnecessary for many applications.

The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face.

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