In the process of growing radish, it is mainly attacked by diamondback moth, ground tiger, aphid, cabbage worm and other insect pests, resulting in unfavorable factors affecting its yield and quality. Reasonable and effective prevention and control has a positive significance for the whole growth period of radish.
The ground tiger and its insect are also known as soil silkworms and ground silkworms. It is not resistant to low temperatures, and occurs in July to October. The larvae gather on the heart leaves and the back of the leaves of the seedlings to bite and feed, and after the third instar, they can bite off the stems near the ground, so that the whole radish plant dies and forms a lack of seedlings and broken ridges.
Prevention and control measures: clean the plot, remove residual branches and leaves; During the occurrence period of the insects, shovel the ridge to kill the pupae, and use the deep turning and fine rake in late autumn or early winter; Insecticidal lamps or ground tiger attractants can be used to trap and kill their adults.
Optional biological pesticides, optional 70% thiamethoxam dry powder seed coating agent, according to the ratio of 1 gram of treated seeds and 300 grams; In its severe period, 20% fenvalerate milk can be used
3000 times of oil, 1000 times of 50% phosphine EC, and 2000 times of 5% cypermethrin EC for fine mist spraying.
Cabbage insects are generally similar in color to radish leaves, are particularly cryptosome, and tend to occur from April to October. The larvae bite the leaves; mesophyll before 2nd instar; The 3rd instar eats the leaf holes, and even eats up the entire leaf leaving only the thicker veins and petioles, resulting in a dead harvest. The survival period of the insects is 2 to 5 weeks, and 5 to 6 generations occur per year, and the number of rainy and humid insects decreases from July to August. The insect population rebounded in September.
Prevention and control measures: clean the plot, clean up the residue and weeds in time after harvesting, etc.
Optional biological pesticide 1% avebacterium emulsifiable concentrate 2000~2500 times; or rapeseed butterfly granular virus 20 larval units/mu spray. The larval treatment can be 60 g/L ethyl multi-insecticidal suspension 2000 to 20500 times; or 10% cypermethrin EC 1500 times; or 50% phosphine fibre concentrate 1000 times liquid spray 2 to 3 times, with an interval of 3~5 days.
The identification and response of common insect pests of radish are introduced here, and I hope it will be helpful to everyone. If you want to buy high-quality and high-yield radish seeds, you can download the seed bank App, and the country's excellent radish varieties are available for everyone to choose.
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