Control of White Star Flower Beetle

White star flower beetle sporadic damage mainly corn, grapes, tomatoes, apples.

1. Morphological characteristics and living habits of white starflower beetle

The adults are 17-24mm long and 9-12mm wide, oval in shape, with bronzed luster and many irregular white spots scattered on the body surface. Only one generation occurs per year. Overwintering in soil or straw compost. Activities began in March of the following year. The seeds and seedlings of maize were damaged in late April and early and middle May, adults appeared in May, and the peak period was from June to August. Adults are active during the day, have pseudolethality, have tropism to wine and vinegar taste, have strong flight ability, often gather to harm male flowers, pistil styles and tender seeds during grain filling of maize, lay eggs in the soil. Grubs feed mostly on putrefaction in the soil or in retting and compost.

II. Causes

According to the analysis, the cause of the insect is: some sheep dung remains in some abandoned sheep pens in the breeding park. The insect parasitizes in sheep dung. Due to dry weather and little rain, it emerges as an adult and emerges from the soil to fly to corn, grape, tomato and other plant fruits.

III. Prevention and control measures

(1) According to the characteristics of adults with group harm, artificial capture can be adopted in the morning and evening or cloudy days when the temperature is low, and concentrated killing can be carried out. Or the artificially captured adults will be smashed, soaked in water for 2-3 days, filtered juice, diluted with water and sprayed on the fruit, can play a role in rejecting adults, to avoid its harm to the fruit. Also can use sawdust + trichlorfon emulsifiable concentrate + sugar + vinegar made of bait for trapping.

(2) Clean up the sheep dung left in the sheep pen in time, or concentrate the sheep dung on the pile, ferment and decompose at high temperature, so as to reduce the places where adults lay eggs and reproduce.

(3) Using the habit of pseudo-death of adults, they are killed by shaking when the temperature is low in the morning at the peak of adult occurrence.

(4) For fields infested with pests this year, plough the land in late autumn or early winter to achieve the goal of reducing the number of pests and reducing the damage in the next year.

(V) Pesticide control: 50% phoxim emulsifiable concentrate 1000 times solution, 2.5% dichlorothion emulsifiable concentrate 2000 times solution, 2.5% kung fu emulsifiable concentrate 2000 times solution spray or irrigation.