Chemical control techniques for three main diseases and insect pests such as kiwifruit canker

Chemical control techniques for three main diseases and insect pests such as kiwifruit canker

In view of the three main diseases and insect pests canker (Fig. 1 ~ Fig. 3), Brown spot (Fig. 4) and Mulberry scale (Fig. 5) on kiwifruit in southwestern Henan Province, the chemical control period and medication scheme were preliminarily determined according to their respective incidence regularities, which can be used as a reference in production.

Fig. 1 kiwifruit canker harms the trunk

Fig. 3 kiwifruit canker damage leaves

Fig. 2 kiwifruit canker causing tree death

Fig. 4 leaves damaged by brown spot of kiwifruit

Fig. 5 Mulberry scale harms kiwifruit branches

1 Chemical prevention and control of kiwifruit canker

Kiwifruit canker is a bacterial disease that seriously threatens kiwifruit production, which can harm flowers, branches, leaves and fruits.

1.1 dormant period (December to February)

Spray 0.136% (mass fraction, later the same) in the first ten days of December to enhance the frost resistance of the tree by spraying 15000 times of Bibu wettable powder or 600,800 times of 5% island vegetarian water agent or 6000 times of 1% S-elicitor water dispersible granule. After winter pruning (December), the whole garden (including shelves) was sprayed with 1 ∶ 1 ∶ 100 Bordeaux solution or 45% Dysenamine (schnaling) water agent 150 × 300 or 1.8% octylamine 50 times, and closed the saw with 1.6% thiamidone or 2.4% humic acid copper coating.

In the first ten days of February, the whole garden sprayed 20% thiobacillus copper suspension 600 times or 77% to kill wettable powder or 50% chlorobromoisocyanuric acid wettable powder 600 times 800 times to prevent canker. Spray dry the lightly diseased trees with 20% thiobacillus copper suspension and smear the disease spots. The seriously diseased plants in the trunk are cut off from 30cm to 40cm below the disease spot, and the pruned diseased branches are taken out of the garden for treatment (can be wet with 10% urea solution and covered with film at random). Then smear the scissors with 20% thiocarbamate copper suspension.

1.2 before sprouting (end of February to early March)

Spray 3-5 Baumetolite sulfur mixture or 1.8% octylamine 100 times or 45% 150 times of Nanning water agent before germination to kill overwintering ulcer bacteria, etc.

1.3 after sprouting (mid-late March to early April)

Spraying 20% thiocarbamate 600 times or 1.5% thiamidone 500 times 600 times, 72% agricultural streptomycin soluble powder 1000 times, 80% allicin, 68% basic copper sulfate dry suspension 800x, 46.1% copper hydroxide water dispersible granules 800ml 1000 times combined with EM bacteria 500x solution to control canker.

1.4 before flowering (mid-late April)

Spray 1.5% thiamidone 600 times 800 times or 20% thiobacillus copper suspension 600 times + 72% agricultural streptomycin wettable powder 1000 times.

1.5 Fruit expansion period (early May to early June)

Spray 1.5% thiamidone 600-800 times + 0.1% tetramycin 1000 times.

1.6 after fruit harvest (mid-late August)

To prevent the infection of fruit stalk marks, spray the whole garden with 20% thiobacillus copper suspension 600 times + 2% Chunramycin 200 times, focusing on the fruit stalk marks.

1.7 after falling leaves

From mid-October to November to prevent petiole scar infection, using 1.5% thiomycetin copper suspension 600 times or 46% can kill 31000 times of the whole garden spray, focusing on fruit stalk marks; ground spraying 2.5% urea solution disinfection.

2 chemical control techniques of kiwifruit brown spot

2.1 Mid-late May

Spray 10% difenoconazole water dispersible granule 2000 times to prevent infection.

2.2 in mid-late June

Spray 80% mancozeb wettable powder 800 times to prevent the disease.

2.3 early July

Spray 430g / L tebuconazole suspension 4000 times + 50% ether carbendazim water dispersible granules 2000 times or 75% naphthol suspension 3000 times.

2.4 late mid-July

10% difenoconazole water dispersible granules 1 500 times or 40% flusilazole EC 6000-8000 times + 80% mancozeb wettable powder 800 times.

2.5 the first and middle of August

Spray 75% diazepam suspension 3000 times.

In late August, 2.6

Spray 50% ether carbendazim water dispersible granule 2000 times.

3 chemical control techniques of kiwifruit mulberry scale

3.1 before budding

Spray 3-5 Baumedo stone-sulfur mixture.

3.2 the first and middle of May

Spray 22.4% snail ethyl ester suspension 3000 times + silicone 6000 times in the newly hatched nymph incubation period in sporadic orchards; spray 22.4% snail ethyl ester suspension 3000 times + silicone 6000 times or 25% buprofezin wettable powder 1000 times + silicone 6000 times; or use 50% fenitrothion wettable powder 1000 times or 50% malathion emulsion 1000 times.

3.3 early July

In the newly hatched nymph stage, the whole garden was sprayed with 40% chlorpyrifos EC 800 times or 22.4% spirothyl ethyl suspension 3000 times + silicone 6000 times; you can also use 50% fenitrothion wettable powder 1000 times or 50% malathion emulsion 1000 times to control [Jishan Huayao].

3.4 early September

Spray 40% chlorpyrifos EC 800 times in the newly hatched nymph stage (if the third generation does not occur or does not occur seriously, do not spray).